as opposed to what it is now where every noob with a greatsword and 50 body armour can spam for positive kdr ?
2 hander has a purpose, but that purpose is in a mass melee, after using their shield to get too mass melee. Taking no shield whatsoever and then crying that ranged kills you ... are you serious dude ?
Suggesting to change the equipment can never be an argument. If we follow your philosophy, all infantry should exclusively be hoplites (shield vs. ranged, spear vs. cav), and if they are not, it's their fault they suck.
The sheer existance of a counter measure against something doesn't mean you can actually expect everyone to follow it.
There is no doubt that there is an exorbitantly high amount of ranged and cavalry players on the servers, and there is also no doubt that the core feature, the most special and unique part of cRPG and Warband in general is the melee system, but both classes, ranged and cav, don't really take advantage of that feature. That's why in my eyes they should always play a side role at the best, it's still a melee game. (Backstabbing cav is no melee).
So the OP is perfectly right that there should be done something against it. I am against any nerfs for cav and archers, but I am for a heavy buff for infantry (although the buff should affect two handed players the least, IMHO).
The only thing I would like to see is people stopping to suggest other people to change their equipment, because this is in no way to be expected. No, you can NOT expect people to bring a shield next to their 2hd weapon, if they want to rely on speed, or if they are already close to their upkeep limit. Of course, 2 handed players should be more vulnerable to enemy fire than players with shield, but on the other hand the game has to be still playable for them. Which is questionable, sometimes.