They can return stronger , return moderate or return milder . It all depends on where the brainwave is over reacting in or on the brain

Yes. Seizures. Are known to start then pause then start again really bad if they are a big one. On top of that if you have a TC seizure then technically the seizure will do this regardless even if it's not as obvious.

Absolutely. Seizures are unpredictable.

Yes, Some People Had Surgery & Their Seizures Have Gotten Worse Right Away Or Some Time Later

Not that I know of. But, If they are under control with meds and your neurologist feels you can taper off, then yes. Tapering off increases that risk.