Completed 3 mining runs tonight, with each of my mining vessels. Pristine Icy ring on the outskirts of the bubble, nothing fancy but a ring with a hell of a lot of various hotspots - reckon close to 20 or so.
The first 2 runs were in a Tritium hotspot (not the same though):
Pure laser mining in a T10 (5 lasers, plenty of limpets) - after 30 odd minutes, had about 90t in my hold. I also mined all other minerals so it took me a tiny bit longer than if I just focused on Tritium. Came across a fair few rocks between 15% - 30%.
Predominantly SSD mining in my Core mining Krait 2 - felt pretty much the same to me on terms of tons per hour - while the yields are ok, the entire ballet around the rock aiming for deposits combined with plenty of failed limpets as a result of you and the rock moving was as much a chore as it was previously. about the same, 80t in 30 minutes that felt a lot longer than that.
Core Mining in my faster Cobra 3 - tried an LTD hotspot just for a laugh, and laugh I did, for all the wrong reasons. 5 cores, 4 Bromellite, 1 Grandidierite. Left the ring empty while physically shaking my head. Oh well it's good that I do no longer engage in targeted mining for credits.
So based on my limited testing (didn't try non-hotspot mining yet) they upped the yield to a max of around 30%+, and the number of rocks within the hotspot that will contain at least ok levels of Tritium have increased also.
All in all, I would say it's better in terms of Tritium yields, but I think laser mining yields of around 40-50% would feel right to me - and that's what you could get in a single Painite hotspot already.
I also think that the focus on SSD mining when it comes to Tritium is too high - the entire SSD mechanic lends itself better to occasional instances of it, as opposed to being the predominant mining form.
Still, I take it, it's better than before (not that difficult admittedly), however I will not take my FC to extended excursions where I might be reliant on Tritium mining. Having to mine for several hours to make a single jump doesn't appeal to me much at all - and I do enjoy mining.
But then I also enjoy pizza, just not every day.