I agree. A decision should be made whether or not you want to consider the room XP, and then design the entire room accordingly. All XP or all general purpose.
I laugh every time I see one of these rooms with big $$$ XP lights installed, with general-purpose switches controlling them, and all of this mounted next to general-purpose phones, pump starters, fuel monitoring systems, leak detection systems, fire alarm devices, security systems, clocks, etc., etc., etc. Not to mention there's no conduit seals anywhere, and everyone's walking around with general purpose flashlights, radios, pagers, cellphones, and PDA's.
I guess those lights must make somebody feel safe, though. And they kind of look cool. Maybe that's why they put them in.