He's asking to switch out SSBKK for the pair of AGL SSB Goku and AGL SSB Vegeta.
I think the answer is yes. Someone did the damage calc on AGL SSB Goku linked with a theoretical dokkanfest SSB Vegeta and Goku either gets real close to his SSBKK counterpart or surpasses it. Either way I think you're better off using this combo. AGL has been getting more RFW cards recently and you can make a case for a straight RFW based team than a SS or SS/RFW hybrid.
Yeah I think I would keep the SSBKK just because if you use the pair SSB Vegeta / Goku then you are floating Vegito so that's not ideal.
Plus having SSBKK at SA 10 I will always out damage that pair. (They are both at SA 2 I think).
But it is a good point though the mono AGL is shifting toward RFW. Maybe I will start using them when the event are so long that his passive runs out.
But they need to stop making them longer and longer, if it take you 15 min to do a battle and you have to repeat that like 30 times to get all the medals for everybody, this is going to be a real pain in the arse.
One think for sure is I do not think I will pull on the Arale cards, those are so not attractive to me :-/
Regarding the SSBs, I have them all as well but there are still really good, there is no way they do a dokkanfest of them just yet !! Bardock and Whis needs one badly though , I could see that being next !