I've never liked that LCI thingy. When they first appeared, I saw an article where the writer claimed to have fired a round by rapping the LCI with something or other.Always made me a bit nervous. Marlin 39s, I believe, have a tiny hole that allows you to check the chamber for brass showing. One easily drilled hole, no extra parts, and no danger. Ruger screwed the pooch on this one, along with the wacky angle for the magazine that makes feeding the first round tricky. Good pistols, but I think a plastic grip frame in the original shape would have been better. I doubt that all that many shooters buy 22/45s for the 1911 grip angle, more likely just the price and weight.
That was a problem with the first LCI design on the MKIII. Ruger redesigned it early on and recalled the originals IIRC. Attempts were made by some to reproduce the problem with the new design, but I have never seen any evidence that anyone has succeeded. It's a very well documented issue that I'm sure you can find the details if you care to search.
I think you're right about the price and weight, but I don't hear complaints from the few owners I know. My only complaint about the LCI is that it's unsightly, but I've come to ignore it (kind of ironic, eh?).