I'm not aware of anything useful in new version. I think that LightningUK! mostly just added crapware to the new versions. If anything is missing in the old 2.5.5.0 version, I've not seen or heard about it.
Burning discs is pretty mature tech -- especially CD and DVD. There's really nothing to add anymore.
(FYI: I'd actually prefer to burn Blu-ray in authoring software, which as you probably know, is entirely opposite of my thoughts on DVD. I've never been convinced that
Imgburn handles BDMV that well. That structure isn't as easy as the DVD IFO-BUP-VOB setup. Nobody is likely to have huge BD ISOs laying around their drives anyway.)
If you want a better reader software, then that's where
Isobuster comes in. He still actively maintains it, and it advances every year. It's quite impressive. I get emails probably every 6 months, alerting us to a new version.
That all said, a quality burning drive still matters most.