I like new characters to interact with as much as the other guy but one would assume focusing on existing characters and expanding upon them before moving on to new characters would work best. The more unfinished characters the dev adds to the game, the more he has to accomplish by the next update(and the longer it takes to release said update). And naturally, it's not gonna be as impressive as people want it to be since there's only so much attention that can be distributed between all these different and ever expanding characters.