Sadly, I can't agree with the OP,

The TP increase in these 2 skills will at least make it feel like the Ninja is actually consuming a resource...
Unlike MNK or DRG, the TP on NIN feels infinite...

MNK can last around 5 mins by using the 3 DoTs (including Fracture) by timing Invigorate, so, I see no reason Ninja can't do the same. Besides Mudra makes you stop every 20 seconds and depending on what you need and the lag effects it'll take 1 to 4 seconds to perform, which in converse results in TP recoverying without losses.

This is definitely something we will not see until the patch comes out tho.