I have two P-07's and have run the following recoil springs in each:
1. CZ's 2017 and 2018 stock polymer guide rod assemblies with captured springs: kind of stiff before broken in, never had reliability issues, never saw the weight published anywhere official
2. ssguiderods.com stainless steel guide rod assemblies with captured springs: REALLY stiff before broken in, never had reliability issues, weight isn't published
https://ssguiderods.com/shop/cz-p07-gen2/3. CGW 15 lb recoil springs on their stainless steel guide rods: not as stiff as the others when new, never had reliability issues
I have been carrying the 15 lb recoil spring in my CCW but I am a bit concerned about it creating extra wear on the gun if used for frequent range trips.
I detail strip whichever pistol I am regularly shooting every 6 months or maybe around 2000+ rounds to thoroughly clean and inspect everything. I was running a 15 lb spring recently on a range trip with my son, where we burned through 400 rounds of Federal Syntech 147 gr shooting steel targets, in about an hour. When I detail stripped the gun after that, I was inspecting the ejector and noticed that in addition to the usual spots where the finish was worn, there was also a noticeable circular indentation on the left side of the ejector, where it rides in a groove on the sear pin. I could be mistaken, but I never noticed that before on the ejectors in either of my P-07's, so I think it is probably new, and the harder impact of the shell casings on the ejector related to lighter recoil spring may have something to do with it.
Another related issue is that for cleaning purposes, I prefer to have an uncaptured spring and a solid steel guide rod, so I can use solvents that may not be friendly to polymer guide rods or thread lockers. So wanting to move back up to a heavier spring but uncaptured, I removed the spring off of one of my ssguiderods assemblies and stuck it on my solid steel CGW rod. Interestingly, the ssguiderods spring and the CGW 15lb spring look very similar, with the heavier spring having what looks to be one additional coil and being about 1/8 inch longer. It is noticeably tougher to get into place when reinstalling, but honestly when I rack the slide with each of them, I can't tell any difference at this point of their break-in period. When that ssguiderods spring was new, it was a real challenge to rack the slide. I could do it but the slide serrations would dig into my thumb and forefinger pretty good when I slingshotted it. At this point with 2-3K rounds on it, it feels like the less used 15 lb CGW spring.
Anyway, sorry to ramble, but if I were you, I would probably look at putting some grip tape or similar on your slide rather than try to drop the weight of your recoil spring too much. Even if it is reliable in the short term, it may shorten the life of your gun's components in the long-term.