So, Birth Island is here now, but I think there are a few thing that may be improved.
1- the easiest. Add a small pc (not pokecenter, a pc) inside the island. I asked people who went there, they all told me there isn't one. Not really nice having to bring 6 random syncr and hope for them to be useful.
2- About the fixed H.A. thing. I get staff want it be more rewarding if you don't get a legendary, but H.A. isn't good on all the poke. Example, nobody would want a H.A. Tyranitar. Set Fixed ability is nice, but need to be different for each poke, according to what it needs.
3- There are too many useless Pokemon. Birth Island is called a reward... but who thinks it's "rewarding" going there, after wasting hours and resources to get to the 1% (next to be 0,5%) and getting.. a Rotom? A Lucario? Really, I think nobody.. not a reward, at all. I strongly suggest to leave ONLY pseudo-legendary in the not-legend poll.
4- Speaking of pseudo legendary.. wants go bring more hype to the island? Want to make it even more wanted? Maybe this is the time to add the very first gen7 pokemon to PRO? :)