Thanks a lot for this lengthy feedback !
I tried to solve the problem with "having only 1 or 2 powerful stat on an item" with the Astral crafting tools, which can shuffle your equipped item. As you can either keep your item or equip the result, you have a lot of chance to merge the stats that interest you on both.
But this is a common feedback to feel at the mercy of RNG. I will probably add something along the line of "increase value of stats by 0.2x on the item" or something like that.
Moreover, some stats are planned that, if removed, grant a bonus stat. This will help mitigate the negative aspect of some craft too.
And lastly "metacraft" will come too, that add for example "regeneration statistics cannot be removed or upgraded".
For now, a major visual work is in the work, with proper animations and landscape mode.
Thanks again for that feedback, it really helps.