I agree that having more days setup where a team can execute a “raid” - medium mountains with the potential for crosswinds - would make a lot of stages more interesting. Plus get rid of high mountain days that end on a downhill. Either you are encouraging very dangerous riding - having to attack on a downhill - or the leaders don’t attack because riders will come back on the downhills, so the mountains get effectively neutralized.
The other “innovation” - mentioned on one of the podcasts I listen to, but I forget which one - would be to put the hardest mountain as the 2nd to last, to encourage people to attack there, and then be able to distance rivals instead of waiting to the last couple of kilometers on the final climb to attack.