Oh, thanks for the input!

I've fixed the problem. It was indeed a spelling error (but not where I thought it would be). /facepalm.

Hey, I'm new here.

My thoughts for your problem are a bit rough, but might be helpful.

Armor Type: You could add some variation of the Night Elf racial that increases ones stealth level to leather/cloth type gear and lower the the general stealth level, that stealth abilities provide, for balancing reasons.

Light Sources: Same idea actually, you can create invisible units that provide an aura that decreases the stealth levels of units within a specific range.

The change to how Stealth works: the way your Stealth is supposed to work reminded me a bit of how Camouflage works (if I understood you right). You could generally decrease the stealth level of units to make them visible within a larger circle but add an additional effect that works similar to Cata's Camouflage (ranged dps' can't attack whereas melees can + standing still makes you completely invisible).

Another solution for the stealth-movement-speed-scaling could be a group of auras that decrease the range of spells that can be used on your stealthed target (no idea how Camouflage is coded, but there might be something that can be used for that) and increase stealth level. You could add dummy auras (that do nothing) to spells that increase movement that replace those Camouflage auras like high ranked buffs do with lower rank buffs of the same group. That would also work with my previous idea (adding those dummy auras to gear (the heavier the gear, the more dummy auras are on it) and light sources (the more light a light source provides, the more dummy auras are present, although I think that would make the number of dummy auras ridiculous)).

I hope my ideas are of any help.

regards, Caedes