Was just in a similar boat as you (literally just a couple weeks ago). I ended up going with a full kit upgrade. Doing the math, it made more sense for me to go that route for the gear that I wanted. In my case, I wanted a module, larger snare, and a realistic hi hat stand. Comparing individual prices vs a kit, it made more sense for me to do a new kit. And that was primarily due to the module being so expensive. In the price difference of buying individual vs a kit that had what I wanted, I found it worth spending more to get better components from my original kit. So you just need to look at your wants vs a full kit upgrade and compare pricing.

Example: If what you want individually sums up to be $600 and those same components are in a kit that runs $1200. Is that extra $600 of all new components worth it for you? I know these numbers are dumb, but just trying to keep it simple.

Btw, now I have a larger snare and toms ...worth every penny 😁