Horwath
Legend
problem is that Reach weapons were "simplified" from 3rd Ed. Why? because WotC thinks we are dumb, obviously. Hehe.And Staffs and spears are way underpowered vs reality. The reach a spear gives should put all swords at a severe disadvantage. Or give the wielder bonus armor to simulate the advantage of their reach.
When you had 10ft reach and your opponent had only 5ft, you would get AoO before that opponent attacked you. with Combat reflexes feat, you could do it several time per round. It wasn't locked behind a feat by default.
Ofc, if we have that in 5E, then attacking within 5ft with a reach weapon should be at disadvantage by default.