I like Stark's idea of reworking the Tiger's Inspire ability to make it more usable. It might be nice if it worked like Command Panther Aura and unlocks at Vet 1 but becomes progressively better with each level of Vet. Being locked behind Vet 4-5 is kind of pointless for how often the Tiger is liable to actually reach that level.
Another idea would be to have 2 separate Command Abilities - one for infantry and one for vehicles. The infantry ability might work like Combined Arms and *not* nerf the Tiger's ability - it's MUCH more usable for those likely situations where the Tiger is your lone piece of armor supporting infantry. The vehicle ability could be geared towards swarm/blitzkrieg tactics and nerf the tiger's combat ability in favor of tactical armor play.
