I'm planning to fly from Gatwick to Orlando this summer for a Star Wars Convention. I'm dreading flying out of Gatwick because I think I would be very disappointed since I've flown out of Heathrow before and I'be heard Gatwick is rubbish compared to Heathrow. The Clubhouse does not look as amazing, I dont think there is a private security channel and the UC cabins from Gatwick I've heard are awful.
True, the LGW CH isn't the one at LHR (not been in it since the refurb, but space alone says it cannot match)and there isn't a private Security Channel, but that takes all of 5 mins anyway.
I am not sure it is 'rubbish' compared to LHR, just not as good. Its all relative. The LHR CH sets a very high standard - hence winning best lounge for x years.
If you are flying U/C then I certainly wouldn't dread it. IFE not as good (in all cabins not just U/C), but with only 14 seats it can feel more 'homely' (if that's the right word).
If it really is that much of an issue you could fly into MIA and drive up - about 4 hours. Personally, I think the slightly less desirable LGW is preferable to the MIA route and the additional drive.
When you do notice it is when you don't have lounge access - I was in LGW last Monday for a quick work trip over to Guernsey. Now that wasn't so pleasurable - still wasn't a killer though.