I see a few errors, but if the pack works, then there is no reason to worry.
let me tell you peace by peace:
for the 1st one, that is just something forge does if the mod info file for a mod is missing.
for the 2nd one, some mods aren't coded correctly, and over right them selfs.
for the 3rd one, it is not loading a part of a mod because you are missing a not needed mod.
for the 4th one.... I can see that it is a true error. it appears to be that powercrystals is errored. I would remove it or if the pack works, then ignore it.