The lvl 2 upgrades don't seem to give any extra stats
Do you mean the grubkin's level? It should add 1 to max HP and damage for each level up. We'll double check that it's working correctly.
I mean the lvl 2 upgrades on the talent tree (the ones that use 2 talent points)
Gotcha, thanks for the feedback! We'll keep it in mind as we continue to develop the classes and talent trees
Thanks again for the report, we have found the issue and it should be fixed in the next update!
No problem, happy to help : D