Although i hate to create new threads in the forum, I tried and check on trello if this has been requested before but I couldn't find it.
I find that glass material is waaaaaay too simple at the moment: it has very few parameters and lacks basic realistic features such as "generate caustics" for example. I think that in most cases this would be useless and heavy to compute, but in some cases (or for some maniac people like me) it could be a must. I suggest a check being taken into consideration only for "ultra" render quality option.
Also, some "glass presets" such as etched, faceted, etc. (as seen in Lumion for example) could be a very useful (and cool) idea!!!