I've got better idea - let the 7 man con nerfs land first, wait and then re-evaluate if any kind of changes are needed.
Now that being said, since I have some free time to waste, I'm going to read this
Ok, I've read it and I hate every single thing.
Here is very brief reasoning:
M3 - given how no one uses shared vet, 0 fuel kubel for that role, 25fu M3 wouldn't even be considered at -all-, regardless of T1 being fuel free or not, also no one uses it as a scout, because much safer, useful and survivable T70 takes over that role in mid-late game.
Penals - what I've said above applies perfectly, also making them even more of a con clone with different upgrade only further takes away all of their appeal.
Sniper - that would make it completely useless unit as single squad of anything would hardcounter it and it would massively impact its ability to move from cover to cover without revealing itself.