Yes, because the (substantial and consequential) changes to creatures and the entire military and position overhaul don't matter at all. You keep thinking that.
No frankly they don't, not when the rest of the game has so many flaws and bugs that need to be addressed, Eye color doesn't improve the game one iota and the new creature-body-assemblages is at best a very minor improvement, what ever bugs it fixes could easily have been whacked in isolation and new bugs will inevitably be introduced with such an overhaul. Its a lot of time sunk for very little value returned.
When he's going through important stuff he's going to do the less-important stuff too. If he's fixing bodies up for a good reason, he's also going to throw in this stuff while he's at it. He's actually trying to be thorough and do things right instead of half-assing every development arc under the sun first and then hopelessly trying to do them more completely later.
I am so sick of the slavish worshiping of waterfall methods, everything Toady dose is not automatically right, and in this case the design philosophy is clearly wrong. DF is a fun game not because of its development model but in spite of them, waterfall methodology which preaches never writing the same function twice means the design is inflexible and unable to adapt to good or bad game-play found through the course of development. All successful games are created by refinement, a crude but modular system is built and then its parts of improved and tweaked bit by bit with maximizing immediate playability as the main goal at all times, you must be willing to re-write code from scratch and nothing is ever 'written to be final', code is only finalized after it passes muster in game play performance.
A small independent donation supported project like this needs to focus on bug fixes first and foremost, no one wants to donate to a project which won't fix bugs, and secondarily focus on feature that have the most game play adding value, and eye color ain't high on that list.