I agree it is slightly outdated but still viable. Since rewind is gone I would take Blood for Blood if they have high health unites like Arthas, Stitches, etc. Imposing presence is strong if they have heave auto attackers as this will help you survive a bit longer. Epicenter has some merit now too but in the meta today I feel Blood for Blood outweighs them all. As for 20 I have toyed with Hive Master and it is pretty strong. Since rewind is gone it does allow him a bit more...

Glad you liked it! ^_^

Any plans for a second Abathur Ultimate? Maybe if his kit was reworked he could be either a clone of teammate or siege hero(locusts and stuff) It would have to be really tasteful to outdo Ultimate evolution though.