I rarely carry my XT1A in the pocket but I do occasionally have the XT2C which has exactly the same UI with a bigger form factor and the mode button never got activated accidentally. When the light is off the mode button only activates the strobe while when the light is on the mode button either activates the strobe (I think if pressed for over 1 sec) or it switches mode. Changing modes is super-easy and this light really allows for one-hand operation, that's why I thought I'd mention it when you said you got your CCW permit. The XT1A always comes on on high. The only downside of XT1A is that on max runtimes aren't impressive. On the other modes they are okaish. I find it to be a reasonable tradeoff for such a good UI.
The clip isn't great but neither is the one on the JB BA10 or Klarus P1A: in fact I think they all use a similar pocket clips. If you buy it, just check with the retailer first that they have XT lights with clips, the first ones were shipped without it. You might want to check if any retailers have the version with the newer XP-G2 LED as it would probably offer slightlybetter runtimes. I read GoingGear already have the XT2A with XP-G2 so you might want to check with them if they also have the XT1A XP-G2 in stock.
Another thing: though Klarus recommend not using 14500 li-ions batteries because it might fry the light, I have been using 14500 with mine no problem for some time: on 14500 it is very bright on max and retains all output modes. In my opinion this is a plus if later you decide to buy lights using Li-on batteries.