There needs to be a BOV (blowoff valve) or bypass valve. The wastegate actuator cannot and will not compensate for a fast boost reduction like quickly taking your foot off the go pedal.
That much oil is not great.
Discussion
Doesn't seem to be anything wrong with the waste gate or actuator from what I can tell.
That stock turbo was hitting 35 psi at the top end and The pressure would jump to 40-41 for a split second when I took my foot off the throttle. I think that hose was going to go sooner or later.
I ordered better hoses and clamps to go all around. Those weren't cheap.
No, nor should they be if you want them to hold up to that kind of use.