I'll go through the shop manual step by step and see what happens.
How much would you estimate the parts being for a clutch overhaul, should it come down to that?
Do what the clutch adjustment and cable adjustment procedure says exactly in sequence. If it's out of adjustment, that'll fix it and eliminate excess clutch lever pressure.
If it's the clutch is actually failing, it's a few hour process the first time through if you clean things nicely as you go along. It took me about 4 hours however I fanatically clean and inspect EVERYTHING and photograph the entire process just because that's me. A generic clutch rebuild is just the friction disks and springs (since you're already in there) and that should be in the $70 range for OEM parts. If you replace the clutch plates also, it should be somewhere around $150. Your price can vary wildly depending on the specific motorcycle, where you buy the parts and which manufacturer. You can beat those prices easily if you avoid the local high priced dealers.