What a mod. I wrote a rather scathing review of Lab Rats 2 calling out a bunch of problems with the base game, and this mod seems tailor made to fix all of them.
The biggest problems were mechanical - the base game is too unapproachable, particularly in its difficulty curve and complexity. This mod helps soften both by buffing certain stats and adding TONS of features for the player to take advantage of. On one hand, it's solving a problem of complexity by adding more complexity. On the other, the new additions are very straightforward, and include things like an easy mode and cheats menu for players who find the gameplay more frustrating than fun.
That said, not every addition is for the better. I feel like this mod adds too many new characters. That might sound like a weird complaint, and even hypocritical since I've complained about the lack of content in the base game, but adding a bunch of new characters solves that problem by introducing another. After a certain point each new character starts to take away from the others, lessening the appeal and novelty of each one individually. I like the new characters, but I'm not sure we need so many. Lab Rats 2 was already a game that felt, "Wide as an ocean, deep as a puddle," in its writing, and some of these new additions only serve to widen that puddle. Personally I'd rather have new content and especially artwork for the existing cast (granted the mod does provide some, it's just not the main focus).
Obviously that's much, MUCH easier said than done - VRen's code is famously difficult to work with. Putting my nitpicks aside, this mod is a major accomplishment. At this point I basically think of it as the real Lab Rats 2, while the base game feels more like a beta release to test new features.
So thank you perverts, I mean developers.