I agree that they might be somewhat expensive but I think it's a good trade off for free DLC. We have to also consider the additional ways to earn relics in this patch (Leveling up, Wins, Offline Bonus etc...) that make grinding for the chests easier.
It is still ridiculously slow to unlock relics.
Say you get 350 relics a day and you do every single challenge a week.
2,450 relics per week. Which isn't even 1 DLC weapon/booster chest. So grinding by playing every day you can just unlock the weapons and boosters within 5 or 6 weeks...
I'll hold judgement until I see how the offline relics work, but I doubt they'll add much more to things. The sad part is I would be completely willing to pay for these considering the maps will be free, but the prices are absolutely crazy.
The Fortune Hunter Club for U3 gave 12 maps and every skin in the game for $25. They're asking a similar price just for 6 pirate skins? I understand they put more work into these skins, and they look great but the prices are way too steep for what is offered.