I agree. What made BF3/4 fun were the large vehicle maps, and the custom servers that allowed more vehicles than the official rules. Typically the best servers had something like 4-5 tanks and 2-3 IFVs per team on maps like Golmud Railway.
In BF6 vehicles more or less are static and unable to kill each other. There is no room for flanking, and engineers just repair each vehicle as they have 3-5 minutes battles shooting at each other to no effect. There also seems to be only 1 tank and 1 IFV per map in the beta maps... which is boring.
I do like TDM and Domination for hardcore, but those are different modes. BF6 seems to not do the vehicle aspect well.