NoNoeWaymomentum would get a big buff
that's kind of the idea.
currently on disad you can run away at scout speed while building and the enemy team can't do anything about it.
since the medic gets scout speed while building, the disad team can hold closer, making getting a point without having to use really hard.
if scout wasn't able to build, you would have to pick between running away and building. which basically means ad situations would last ~10s longer. this means less stalemates (which are boring).
the other thing that forcing a demo/solly to build does it it means the demo/soldier cant spam the chokes as hard, which also makes pushing with ad easier.
it's not a super big change imo and it's pretty "vanilla", as in, it doesn't require any special plugins/mods. would be down to give it a try.