Well, giving lancers an old angle and taking couch would be a huge buff against inf actually
There were less cav vs inf fights before (up to the old ages) because:
1) There were less horsemen in overall = easier to kill horsemen.
Now: sometimes it happens that up to 40% of the players are horsemen and being inf means that you'll have to fight the horde of enemy and friendly horsemen. IMPOSSIBRU
2) Archers had a better projectile speed = easier to kill horsemen
Now: archers are still effective against horsemen but it's way more difficult to shoot at horses.
3) Loomed horses had less HP = easier to kill horsemen
Now: Loomed and not loomed horses were rebalanced so it became harder to kill horses. Plus there are way more loomed horses these days.
4) Players had less riding = easier to kill horsemen
Now: There were times when riding was 6 agility per 1 point (ages ago), now it's 3 and it gives ability to have a lot of riding even in high strength builds on high lvls
5) 2handed lolstab outranged everything and had more damage = easier to kill horsemen
Now: It's nerfed now, though still can be a cav nemesis in hands of good twohander
6) All polearms could rear horses = easier to kill horsemen
Now: They removed it from a lot of polearms
7) Horse Archers were more powerful and they started from killing other cav = easier to kill horsemen
Now: Horse archers are rather annoying than effective, though they still can kill cav.
8) Throwers were a pain of cavalry (especially 1million of throwing lances in pocket) = easier to kill horsemen
Now: not that many throwers as before (and everyone's happy with that) and the amount of throwing weapons got nerfed drastically
9) Crossbows had better accuracy and reloading speed plus air friction had a smaller value = easier to kill horsemen
Now: only extremely high WPF crossbowmen can snipe and it's still difficult to calculate the trajectory on high ranges and it deals less damage.
10) There were a few maps with open plains
Now: at least 60% of the maps are so open that it makes cav an easy class, almost no town maps left.
11) Dead horses didn't have hitboxes so dehorsed horseman was a good target = easier to kill horsemen
Now: dead horse has a hitbox for some certain time and it's bugged so I can't shoot/hit a horseman sometimes when he's on the ground even if I see no horse over him
Giving old lance angle back you'll make it so that they won't even need this couch because they'll be busy killing everything. Some honourable horsemen will try to kill each other but at least 50% will use it against infantry, I bet. Like cmp said ages ago: Give cav 300 length lance and they will use it to backstab.
Cavalry has no risks to go into the difficult places (like ruins or whatever) because they don't take damage for bumping players/objects/walls, they don't take damage for falling down from a horse and they have a temporary defence while they're on the ground (lying inside of the wall or being covered by the corpse of the horse) so you can just take your melee weapon, whistle for a horse and proceed with your job. With this old lance they'll have an advantage even in town maps so you'll gimp inf even more