I wonder if I would....
Assuming that the new TI hard gives red tier tools, which gives 2/2 extra stat per level.
And let's say the base stat is 2 tiers up, so +10/10
I for one have lv 17/18 tools, which is going to lose a lv (red takes more exp)
So I'm going to net around 35/35ish stat gain if I switch
My gold tools have 2-3 good stat and 4-3 ok stat (obviously, I removed the bad ones for reforge), this would require the new tool to have 1-2 good stat and rest stat being close to ok at the very least to be better, if there is a SINGLE bad stat on there, then it's not worth switching, unless I do more reforge which would be a pain (on a side note, I can't reforge the awesome stat I already have onto new tool, not unless I'm willing to give up all the tool exp)
So as it were, unless the random stat on the 40k TI is pretty darn good to start with OR it is say at least 4 tier up, there is a good chance I won't bother switching anyway. At least not for a good long time.