All time when you have a party with a hireling, I note this:
1.- Every hireling take a party spot.
2.- Hirelings don't have enough intelligence.
3.- The most important hirelings are the clerics, and if you want they heal better, you must put him on aggresive behavior.
PROPOSAL:
-Turn hirelings into a second pet-
ADVANTAGES:
1.- No more spots filled.
2.- Intelligence will not be a problem anymore.
DISADVANTAGES:
1.- More lag, more work for servers.
COUNTERMEASURES:
1.- Let the game client, calculate the behavior of the hirelings. Server will be free of those calculations.
2.- Limit hirelings to only 1 per player. Again less calculations.