Imagine you're in charge of the Republic from around 3132 to 3150, and you have to develop the military to defend it.
Now, imagine you've been cut off from your external suppliers since at least 3143. (Fortress Wall).
Here's the problem I see;
You have to narrow down and standardize, or your defense army is going to be impossible to maintain, and it will be dependent on 'points of failure'-that is, elite equipment that if you lose one, you lose the battle.
Standardizing simplifies a lot more than your supplies (making max use every cubic centimeter of storage and every kilogram of logistics is HEALTHY, and presents a significant readiness boost, since having lots of spares that actually fit and ammo you can actually load makes it easier to train, and to recover from battle damage, and get units back into the field faster.)
Standardizing simplifies your training, letting you train MORE pilots, drivers, gunners, and so on, faster, to a higher quality standard, than having to adjust and adapt to a variety of different designs for what amounts to a mix of cosmetic and vanity.
I'd start by paring off the vanity systems. Tripod? doesn't really have a viable battlefield role and it's hugely expensive, so those go to the scrapper for raw materials.
Pick one 'mech in each weight class, done. Likewise for tracked vehicles, these should share engines and some automotive componets with your wheeled vehicles in order to reduce training time, increase the availability of working spare parts, and reduce the logistics costs on tooling.
Battlesuits? Pick ONE good design. It doesn't have to be the best design, but it has to be credibly good enough. You make up for it in training, tactics, logic, and skill.
and numbers, because since you're not building fifty different kinds, you can build up a huge supply of one or maybe two designs, and have operators who actually know how to use them, techs who can actually maintain them, and spare parts available to do the maintaining with, located where it's actually relevant to have them.
this type of formula works with nearly anything in the assigned spots, so long as you actually produce it, train with it, and intend to field it.
What the RoTS has in Canon, is a superb collection of milhist artefacts, whether you're talking the RoTS army, or their Navy, but it's so varied with so much variety that it's effectively unsupportable. Fixing this, would do a lot to make the Republic forces actually viable against Clan Wolf.
or anyone else, provided your officers don't have to call home and ask Devlin's Permission to wipe their asses.
