Well... it wasn't that bad, actually better than any food events imho. You still need to talk to people and such, but somehow I didn't feel like it was a pain to get through. But hey, maybe it's just me
Give it some thought ma man and I mean real good one, forget about the looks, there's still time.
Judgin' by your two screens above, you already have what you need except a great stunner - Burnice is useless in the fire team for DA, don't use her there ever.
Ju Fufu will elevate your account far more than Astra ever will, cuz:
1) She's a
more universal fire stunner in general unlike Lighter who's only good for fire and Ice teams (he also not a fast stunner and Koleda beats him here by a country mile), so you'll be able to use her in variety of teams incl. Physical one (when it'll be viable again). Will work great with Lucy to build up even more Daze and faster.
2) Her disc set will
increase Crit DMG for all squad members by 36% (basically permanent) if their Crit Rate is above 50% - extremely easy to achieve as it is tuned towards ATK characters and other characters focused on Crit Rate / DMG
3) Her W-Engine boosts daze, cooldowns and has 25% DMG increase to the whole squad without the need for quick swapping - will give you a chance to buildup more decibels and actIvate Ults faster.
4) You'll have plenty of pulls to get her and her W-Engine in 2.0
5) S11 will work great with her (not as good as Evelyn, but still) and you'll have two Fire teams ready for SD.
6) Can easily work for a double stunner team (have everything in her kit for it), she doesn't depend on it and so she's even more flexible.
Now, let's look at Astra.
1) Her Idyllic Cadenza state
increases DMG by 20% and CRIT DMG by 25% - less than Ju Fufu unless you pull for her W-Engine which adds additional 10% DMG increase, but you don't need it and Ju Fufu's W-Engines is a lot better.
2) Can heal ~3000 HP for the whole squad and
you barely ever need it really, unless you can't play the game, dodge, deflect, counter etc. for some reason
3) Completely non-existent one button character during a combat. It is not encouraged to switch back to her during her Idyllic Cadenza state, which is
forcing quick swapping for max DMG and cuz of which you need far more time to build up decibels / energy bars to activate Ults and EX Specials
4) You don't need her for Miyabi and for Yixuan probably as well
5) She's tied to Evelyn team, even though you can slot her in to help SAnby (probably the worst ATK character in the whole game at M0 tbh, without her W-Engine though) and Trigger / Qingyi, but it's not cuz you need her for SAnby, it's cuz Sanby is bad without her and Electric team needs far better Electric support and it's not Rina.
Here, I did some quick Fire team testing for ya

:
I probably should've used Koleda as well, but as you can see, it may look like Lucy and Nicole are bad, but the problem is not so much in Nicole or Lucy, but it's the fact that
Evelyn heavily depends on Astra and Lighter's Fire DMG buff can't get you these 20K without Astra (I don't have his W-Engine though, but I don't think it'll help that much). So, one characters heavily depends on another specific one and there's nothing you can do about that for a mono Fire team at the moment unfortunately.
6) Depending how shit enemy / boss layouts are, you only need Astra for 1 DA stage and +- 2 SD stages and even still, you're not missing much polys and ~one pull at worst.
7) Astra won't help you if you don't have a great stunner, can't buildup Daze faster to trigger stun and it heavily depends on how good you're playing and a boss you're fighting.
You already have M6 Nicole - one of the best supports in the game still, M6, F2P - universal, can gather enemies into groups for faster vipes, her M6 make it so the EX Special and Ult can increase CRIT Rate for ~12% against eneimes damaged by them, so basically every enemy she manages to group together and you can shoot EX Special and Ult almost at the same time! She's not good against fast moving bosses, but all you need is for her EX Special or Ult hit them once to get a buff and then use EX Special to trigger it again - profit.
You already have M6 Lucy - one of the best supports in the game still, M6, FP2 - universal, her W-Engine increases attack for the whole squad by 10%, can work as a daze builder cuz her EX Specials increase ATK buff, increases DMG and Daze of all of her EX Specials, her boars increase Lucy's CRIT Rate / DMG if there's another Fire character in the squad, her boars can help in battles and can be buffed up to 200%. Also, her EX Special increases ATK for the whole squad up to 600.
Just a food for thought from a man who has Astra. What to do with all this info is up to you in the end and whatever you decide to do...
Good luck!

Update:
On a side note. I've been thinking about it for quite some time and even though it's cool, flashy and all, I really do think that they MUST let us control the amount of VFX bosses have, cuz some of them are absolutely insane and to the point even, that you literally can't see shit and most importantly the deflect flash to quickly react to what the boss is doing and build up Daze. It's so fuckin' annoying. I'll let them know during the next survey.