My main issue thus far is I haven't found much that is useful to put Evoliths on. The other of course being that there dont' seem to be very many good evoliths to put on. Some of them are very nice, but completely situational. The ones that arent' situational are unfortunately rather weak, or are relatively useless.
The WS Evo's look nice, and some of the magic ones, but I mean... I think what everyone was expecting out of this is either 1. Ways to make our already nice gear (that isn't endgame stuff already, ie: Hauby) nicer, or 2. Ways to make gear that is otherwise useless useful.
2 would make sense if they actually had useful Evoliths to put on this other gear, and if we were able to put Evo's on rings or earrings.
1 Obviously isn't true, since I've noticed very few staple pieces of gear so far that can be etched for evolith.
I think Synergy is cool and all....I just think SE needs to really work on updating the amount of equipment that can be etched and the variety of non-situational evolith that are out there (Ie: Standard Acc/haste vs. All enemies or -Perpetuation costs, Pet accuracy/haste/atk, Straight up conserve MP gear, that sort of thing, not just vs one type of enemy found only at the bottom of Goblin Wolfman's dirty toilet on Darksdays with Light weather while wearing a santa cap).