I’ve been thinking the same question since I started on TR. I’ve got the same goal of using the bike to drop weight but improve on power. 87kg start of Jan, 84kg now, FTP220. First foray into structured training.
I found moving to a process goal of hitting all three workouts on my low volume plan and prioritising fuel on the bike and dieting around my workout has worked well. I typically have a small snack around an hour before a workout and a gel or two during. My logic is the fuel on the bike stops me pushing too deep into any glycogen stores and then having to chase it back at a later date.
Looking forward to my next ramp to see if six weeks of SSLVB1 has driven FTP improvements whilst dieting.
Keep it up.