The ILLs are so easy to get if staying at a resort and I love them. We scheduled them for when we wanted, worked out great.
I am sure it is all in the breakdown, but $20 for approx 3 mins of ride time sounds pretty crazy to me, at least when I've already paid WDW admission prices.
Twenty is today's price for Tron. Tron is okay, but not $20 awesome, IMO.
Curiously, 7DMT is at $11 today, and a 6:30pm ILL is available as of 1:15pm. IMO, it is time to swap it to G+.
FoP is $14 today and still available (5pm return time).
We have taken to (mostly) skipping 7DMT, FoP, and Rise. I've been on them, and they aren't worth the upcharge or 2hour wait.
G+ is slightly easier to stomach, because it = has some value all or most of the day. Though it depends on the crowd levels and price that day.
WDW is in a sorry state of operations though. The through-the roof pricing is just part of the problem. At the current pricing, park touring ought to be a breeze WITHOUT having to pay for G+. Paying $100+ to walk in the gate, AND making park reservations, AND having to wait 60+mins for 3/4 the attractions in the park is a bit absurd.