Completely agree with Asterix. If target universes are existing ones, players in that universe get a big advantage: they have built their planets with a strategy (short or long term). Players coming from "exodus" universes will only get remaining free spaces (if there are any, with all accounts that should have been deleted for a long time).
ex: I' im uni 10. I have to move my account to universe 5 (target). All inactive accounts in uni 10 will be deleted/removed, since they don't move (that's good, very good!). How can you have some equity if inactive accounts from uni 5 (target) are not deleted/removed: they are using slots that others would like to get.
Another ex: I have 2 planets in 1:210 (ghosting not too expensive since I'm in the same system, even with my big fleet). Now, if I'm transfered to 1:203 in the target universe, it's OK. But if I have 1 planet in 1:205 and the other in 1:208 (not that far, though), it makes a huge difference.
Another ex: I know that more fleet targets are in G1 or G2. If there are no more slots, I will be located in G3, or even worse in G9... Too bad!
That would be acceptable if and only if I can get the possibility to move my planets (perhaps not all of them, but at least half of them) without paying any DM, at least in the first 2 weeks after transfer.
I would agree that all players are stuck with the same rules (I know that there will be some unhappy users with the unifusion), i.e. target universes are empty at the beginning (same rule for all - first players get their planets as close as possible to their original location - others where there are some slots left). I don't agree if the target universes are existing ones.
PS. I'm kendiraton, well known on the french board to always be against GF's changes

But there are some reasons for!