[1.0-1.004] Master Scouts
Master Scouts really give you about +50% movement to all units guessing that 50% of territory are Forests, Swamps, Hills and Rivers. So with Master Scouts all your units get +50% experience and you expand 50% faster. So on season 100 your faction is as powerful as another faction without Master Scouts on season 150. Stealth is nothing in comparison to Master Scouts. Imho Master Scouts should cost 2 points.
[1.004] Master Scouts still costs 1 point. Stealth costs 2 points now. Stealth is not as strong as Master Scouts. You can build a couple of spearmen for defending and play carefully without Stealth. Anyway wildland monsters can attack you even if you has Stealth. In other hand, Master Scouts gives you strategic advantage in addition to faster expanding and faster experience gaining.