Yea but its via commander and muni taxing to spam this ability. Like someone mentioned above, high level players have no problem with ground attacks. If this ability was stock than yes it will be OP!
Guard button is also doctrinal ability and is even more taxing to spam it as it costs more.
You can't ground attack with PTRS.
These two abilities should cost the same, I don't care if it means cheaper button or more expensive PT.
If its reasonable enough for UC to have its repair cost increased because of fausts, I see no reason why PT shouldn't be increased because of button.