Someone already mentioned that they think the opposite is better: use SPART or TDs, not regular tanks, due to how costs and number of vehicles per battalion works.
Are you saying you prefer the lower width?
I am with blahmaster6k on this one, I pretty much wrote something similar on another thread concerning tanks already.
True, SPART/TDs in their designated Battalions are cheaper to produce due to less equipment required, but they are then also weaker in combat for their width.
If for whatever reason you need to throw out tons of punch in one single division and don't mind the costs, then regular tank divisions still have their place.
Or better said it isn't even that much of a cost question but instead of what you want to achieve. For the same cost you can have multiple tank divisions that are weaker or fewer that are way stronger... and what you pick is basically depending on who or what you are up against.
But that said, otherwise I would agree, if there is no real reason to throw this much punch into one single division then you will likely be better off saving the IC for more Tank divisions or even something else entirely (like Planes).
Personally I think it would still be in the best interest of the game and everyone if the devs would homogenize the tank battalion widths and equipment amounts into 2 width & same equipment amount for a tank size no matter if it is regular tank, SPAA, SPART, TD or whatever role you come up with in the tank designer.
Would remove the balancing mess and you could directly compare performance and adjust values in the tank modules instead of having to buff/nerf equipment numbers or adjusting battalion widths which will never really work out as well because especially the combat width is not granular enough to allow for that and only results in very odd division templates.
But that said, I think it is obvious to everyone and almost everyone will agree that there are several balancing changes still necessary, and probably various ways to go about them (some more simpler/complicated than others) and I will live with whatever changes will happen.