LXY bbrs could stand to have another missile loaded imo. Increasing them to 6 missiles really would give them that "lxy" feeling. Also bump their speed up to 80.
LXY HTTs need moar HP. Currently they're 1073 which makes them have 912 total HP after faction perks are factored in. Considering most factions are 877 and IC's regular HTTs are 926... I dunno. I feel like LXY should mean "the best available" and I like what was done with LXY figs and LXY sfs (not sold on LXY ints). LXY htt's don't feel luxurious, they feel like the same as any other HTT. IMO LXY HTTs should be better than AP.
LXY HTT: 10% lower sig, perk hull plating to 1380 (with faction values puts them right around where armor plating is) and beef up their mass to 150 (less than AP).
Alternatively LXY htts could have large shield

(this would probably make them godlike, but hey, at 1500 a pop...)
For ints I really liked the idea of doing a separate booster line. I don't know if it's POSSIBLE to do this, but giving ints a booster that gets them from 0->250mps VERY quickly and then sustains them at 250 mps long enough to go 10k would, I think, be ideal. If that's not possible, nerfing their fuel to somewhere between where they are now and where CC ints are.
I also still believe the Minigun changes I PM'd you might be the best way to go about it. It is, overall, a *slight* perk to ints, but it does make them much weaker against bomb runs (though they are slightly stronger against AC). I'd also suggest taking a touch off minigun damage to miners. Not much, maybe 5% at most. I felt like I was being outdamaged on a miner by a single heavy.
Figs need more fuel. With hvy booster loaded I could get up to 300 mps and sustain it for like three seconds. With booster 2 I was able to get to 170 mps (scouts go 160) before I ran out of fuel and couldn't even sustain that for very long. IC Sup is still hideous but that's not your fault
I noticed Dreg's miner capacity is at .95. Traditionally I believe that's been a bit lower (.75) and you might want to look at that. Granted you're the one who commed Dreg but their econ seems a mite strong.
Other than that I really like how INTs fly on your core. I'm a big believer in the "perk, don't nerf" style of balance.