Yes, a forum member here actually got the 5-reel Shitstorm on Thunderstruck II for over 8k x bet, it was briefly mentioned in the past so you may not have heard about it, the screenshot hasn't been reposted for a year or so.....
But as for saying the bugs and html5 versions of IR and TSII were resolved, maybe so but the trimmed-down html5 versions look as dull as ditchwater, like a Christmas tree in the new year when the decorations have been removed and reboxed and the tree is a faded dry shadow of its formerly festooned self, ready for chucking in the garden waste bin.
Yeah I had a rant about this in a couple of videos on my old channel, IR in particular in its HTML5 form (even after a reworking or two) was still shite compared to the Viper Client original. (I know someone who works at MG and I complained to him bitterly about the shittification that their classics were suffering a few years ago, he told me at the time IR was getting another pass and they did improve it, but it was still crap, and I told him so, he seemed slightly offended.)
My suspicion is they were trying to reduce the data payload, so the games load quicker on mobile devices, as the days of the Viper Client cheerfully creating a hidden folder on your PC and quietly downloading gigabytes and gigabytes of data in the background for its game store (that's what it used to do, BTW) are of course long gone. I noticed this when I got my first SSD boot drive for my PC, it was only 120GB (they were bastard expensive back then!) and I noticed a load of space had mysteriously disappeared off it - so I went hunting and found the hidden MGS folder
(It wasn't a terrible idea in and of itself, the problem was it used a hardcoded location on the boot drive, and there was no option to farm it off to a data drive, short of using a symbolic link in Windows or suchlike.)
So yes, on the HTML5 versions the frames of animation had been much reduced, like when you get 5OAKs on the main characters, they were smooth and fluid on the Viper Client version, but are all jerky and fuzzy on the HTML5 versions, and even the bitrate on the audio sounds like it's been reduced as well.
I've still got some videos from back in 2014 from an even older YT channel of mine, when I had four of the MG 243-wayers running simultaneously in the Viper Client - good times! (I'll get around to reuploading them at some point.)