She can generate lightning from her own body. She can cause clouds to rain or snow. She can control winds, to the point of able to lift her (and others) to carry her through the sky.* She can make the environment colder or hotter. I have no issue with the assemblage of powers being assigned to the hero called "Storm" - but her abilities seem very disparate to me.

*How strong must a wind be to carry a fairly hefty looking young woman like Ororo? Would that cause an inordinate amount of collateral damage? Or is her control over them that tight?

For my part, I think I would rather have the power(s) and then define a name more than saying that she controls weather, and then start adding abilities. And again, it seems a bit scattershot. Even Magneto, powerful as he is, bases his power on one mutant ability; magnetism. Storm (and Nightcrawler) seem to exceed that, to me.

All the disparate powers you list seem very easily to come under the heading of controlling the weather. All Storm's abilities seem to stem from what we would consider variations of weather in a way that seems more consistent than, say, Magneto generating a force field which seems more of a stretch under the heading of controlling magnetism than making it rain or snow or thunder and lightning under the heading of controlling the weather.

Regarding Gambit, he entered the frame shortly before I ditched the X-Men for good and I know little about him, beyond him being almost an apex (or nadir, depending on your viewpoint) of Claremontisms. However, this CBR Legends page claims he was not supposed to be Longshot reimagined: LINK (scroll down, it's near the bottom)

From the page linked to above:

I think they've made Nightcrawler's physical powers part of his natural genetics, and teleportation his mutant power. But I may be misunderstanding. I agree with JB that he goes too far as far as being a mutant...but I love the guy!

I think Thunderbird had more than 1 power: super strength, senses, reflexes, or some such.

Morrison or Bendis can then rapidly age the child to adulthood and send him on a quest for vengeance against his crummy father and the rest of the team in "L' Revanche! Emphasis on Revenge!" a twelve-part crossover series that will carry across six separate titles and a special insert comic sold only with early pregnancy tests.

Peter M., I recall Storm manifesting lightning at least once, in the second part of the Arcade story (yeah, like I remember the issues at this late date) But I seem to recall that she very often shot lightning from her hands, rather than calling it from the skies. I've no problem with Magneto forming a force field... although, like Alan Scott, I'd like to think he could still be taken out by a 2 x 4.

Ms. Jansen, I think a little cultural linguistic element here and there adds some flavor to the characters - emphasis on a little. (Query: Would Xavier's telepathic language lessons have included such euphemisms and shortcuts?)

I didn't mind Wolverine's healing factor. I minded his instant healing factor. I wasn't very fond of what we saw in the movies. I would be okay with, "My god, wasn't his arm half off three days ago? He's perfectly healthy now!" "Yes, but I still wouldn't want to see him after a fight with the Wendigo."

As for Gambit... do they wear a lot of heavy dusters in New Orleans with an outlandish purple and blue body suit underneath? To me, he was, as noted, another accent using blow-stuff-up character. As subtle as getting beads during Mardi Gras.

Mardi Gras conversation:

"Show me your boobs!"

"Oh yeah? Show me your nuts!"
"Sure! Didn't I just ask you to flash me in public in full daylight?" :P :) :D

Another telling difference: the robot pal who would have later dug Umlaut up and puppeteered his dead body about like a marionette would have run on alternating current rather than direct, as Warlock does. See? Totally different. :-)

(Edited to add: Rebecca beat me to posting a reply! I really take too long writing these... :-) And Rebecca, I'm sorry if my response above contained a spoiler for the what finally happened to poor Cypher.)

Re: Warlock. I liked him. I had no idea why he was on an Earth mutant team. See also: Longshot.