The maturation time required for any beer is usually a function of the ABV. More ABV = more required conditioning time.
Looks like that BB Imperial IPA is 7.3% ABV if you followed the recipe. I would give that one about 2-3 weeks in primary then AT LEAST 6-8 weeks in bottles to carb and condition. The ABV also makes the yeast sluggish during carbonation, so this one is literally going to take about 4 weeks just to carb up properly.
YES, the hop aroma is going to fade somewhat, but that's the tradeoff you made when you decided to do an Imperial.
The best way to combat that would be to dryhop with about 1 oz of the same hop you used as your aroma addition in the original recipe for a full week right before you bottle. That will give you as much aroma as you are going to get in an imperial due to the maturation schedule.
If you drink this one early, it will have an alcohol bite. If you give it ample time to mature, the alcohol taste will smooth out.
That's about what you're facing. Good luck!