I miss having strong winds and bad weather which really made a difference in S:TW. I still remember waiting for a lull in the weather where my archers would be able to inflict more casualties across bridge battles. Also recall that heavy rains used to reduce visibility and therefore range.
Sadly, I don't notice this much in R:TW (the wind factor isn't there I believe but I'm less sure about the rain factor). These might have been taken away just like the "only the first few rows of archers can fire" rule, which would have been a pity.
I doubt if we can easily fix these issues though if the exe hasn't been hardcoded to factor in wind and rain variables...
Anyway it would be nice to bring back the wind factor with arrows being affected a bit more than sling bullets.

Slingers currently have a missile rating of 4, melee of 3 and have 40 ammo at 80 range. I feel any nerfs we apply to archers should also be partially applied to slingers. They may have less missile rating than archers but having more ammo makes up for it and from what I've seen while Rhodian Slingers are brutally effective even regular, garden variety slingers can easily take out a whole grunt unit standing still in the town square and then some.