I don't dislike retro games, actually love the art style of Streets of Rogue and KeeperRL, for example, and I agree it's a great way for indies to get budget under control - it's easy to be tempted to just get better art, but then animation, collisions, interactions etc still need to be coded and contribute significantly to development time.
that said, what makes these game look at least weird is the combination of very retro tiles (say, 1994is, master of magic level) with late retro higher def sprites (say, 1998ish?, baldur's gate level)
while going retro style is not a bad decision for indies, the graphic and ux suffer from being mixed styles, and that's imho a valid criticism.