I get the sentiment:
A few years back.I was in the exact same boat,bought a phone w/the promise of ICS,right there in black & white,on the mfgs site,for God & everyone to see.
Long story short,it never came,the reason being,from my best recollection,ICS & mfgs U/I didn't play nice w/the hardware.
I screwed up & took an incremental update,to be forever stuck/locked down @ GINGERBREAD 2.3.5
If I'd been patient,I coulda rooted/ROMMED & had the best of both worlds,including an enhanced version of the mfgs unique U/I & features,with a bump up to ICS.
Lesson learned:Do not take an update sight unseen,find out as much info as possible beforehand.
I had the G3 for a very brief time,loved it for the most part,lots to like w/the hardware/button layout & U/I.
Just couldn't get past the oversharpening w/the display.
Anyhoo,seems I was in the minority on that account & from what I've read,this & the thermal throttling can be overcome as well w/a couple mods.
If you're itching for LP,I'd at least give the aftermarket development side a shot before throwing in the towel...............