Thinking about a suspension upgrade for my 2015 Kona Process 134 DL

I have a 2015 Kona Process 134 DL. I bought it new, so it's been with me a while. I had been having some thoughts about getting a new bike but I only went mountain biking about 20 times last year, and I'm anticipating less this year. I've also been on a tighter budget lately.

So here's what I'm thinking about doing instead.

* 150 mm air spring kit for the fork. (Currently 140 mm.) Chatter elsewhere online suggests that people are/were getting better descending performance without much downside. I think I need to get the rebound damper reshimmed too, I have it run all the way to max. damping but it looks like it can be stacked lighter or heavier. * DebonAir air can for the shock. Honestly I've been fighting the shock on and off for a decade: if I run it soft enough to use all the travel, I don't get a very firm platform for pedaling, pumping, etc. If I run it to feel right for those purposes, I don't use all the travel. So I think a higher-volume air can could give me the handling and pedaling I want and a smoother ride on chunkier stuff and hits.

Thoughts?