No, no one begs for slow in LHC/Monster Park. They could honestly care less. I only use slow when I boss. Being a Mage is what gets you kicked if anything.

Even without slow, rush skills are so prevalent in most classes it doesn't change much.

Definitely reset it with the next SP reset scroll we get, it'll reset everything but beginner skills. At MP, I never use slow; LHC, sometimes depending on my positioning; and at Stronghold, pretty much whenever I can get a cast safely in. I haven't trained in forever though, but I can say that for any boss that moves around, slow is the most useful thing in the world.

true slow is useful but the rest of maple world barely knows what the skill slow is used for or how it works so don't worry about it if you don't say anything they'll never know~

You'll live. Just wait for Nexon to handout a free SP Reset and it'll be fine.

They probably won't accept you in the party in the first place.

Because i'm an I/L mage?
Damn, maybe i'd better make a thief or marksman again or what? =S