Day 27: Game You’d like to see a new / improved edition of…
Oh, wow, let me see.
My first instinct is to say AD&D, because while the 2nd edition ruleset is reasonable, the organisation is distinctly sub-par (try finding info on how you use holy water sometime) and some things could really do with being made more consistent. But there's a myriad of retroclones out there and I'm sure one of them does the job, it's just we use the real thing.
Um, I think I'm going to go with either Deathwatch or, bizarrely, Hellcats and Hockeysticks. While it's not necessarily what Fantasy Flight want to do, I personally feel Deathwatch would benefit from an overhaul to bring it in line with more recent games; with cutting out some of the generic 40K RPG stuff and transferring it to an appendix on cross-product gaming; and with a very serious look at balance, specifically all bolt weapons and reconsidering the somewhat all-or-nothing way the psychic phenomena rules work.
Hellcats seemed like a promising game, but felt like it was trying to do too much with one product, covering a wide range of possible genres while simultaneously not feeling very focused. I would like to see a new edition that took a narrower subset of Girls Behaving Badly as its basis and concentrated on doing that effectively, while also refining and improving the skill system, which was counterintuitive.