Looking at it, you get the ability to heal deadly wounds 1/day without a medkit.
With another feat I could do it 2/day. But really still doesn't look great.
Three feats later, I could use the Unchained feat to unlock more power, but still is just not enough to me. Any way of making it actually good?
Sadly, no amount of optimizing can save the Heal skill. It's only useful in games with downtime and no healing magic whatsoever.
A wand though does start getting expensive. Its good during short down times though for sure.
Trying to figure out more ways than just wands to heal party composed of a Barbarian, Mesmerist, Air Kinetisist and one currently unknown character.
Overall, what is the fundamental issue with the heal skill that no amount of optimization can ever hope to fix?
The huge time needed is a big factor. A single casting of lesser restoration or a full night and gold expenditure for one person is but one comparison.
Using up feats for improving a skill (and than only a little) seems to be a waste of them to me, but then I play mostly as dedicated healer/buffer/support caster (and have never needed a wand either ;)).
The important thing for you to consider is this: how often will you use the effect of the feat? If rarely, are there alternatives you can get to cover them? If regularly, it might be worth it.
When you look for other ways to heal the party, maybe you can lay your hands on some form of polymorph to gain regeneration. If psionics are an option, there are psionic items which grant regeneration too.
You can invest into the feat leadership and get a cleric follower, too. On the same note, you can maybe get a summoned and bound follower with healing powers. If none of you can do a Planar Binding (or similar spell), you can still get it from a NPC, if your GM plays ball...there is no problem to have the summoned extraplanar serve somebody else.
It wouldn't have been so bad if Faith healing wasn't usable only once per day and if it healed faster than normal Treat Deadly wounds.
I think however, I am going to try to bump up my own healing skill, as the 8 hour ritual to remove afflictions I think could be very useful, even with magical healing involved.