Mmm no.
Grinding is doing the same thing over and over again with no change.
Doing events that unlock other events that in turn, unlock more events, is just playing the game.
The Collect'Em All event isn't something to worry about right now. You certainly can complete it if you'd like but there won't be a reward for it till the next update.
Loyalty Event, Almost There is another issue. It's not really a bug, just something we didn't implement well.
This should have been completed BEFORE the date sex with Jacky. Currently players can rush the Jacky date and completely miss this event. With how the current build leaves Jacky in a state where she's avoiding Ryan, it's very hard to build her libido after you've have sex with her. This will be resolved in the next update.
The only way you can raise it without cheats is to have Jacky and Sidney rub sunscreen on each other for +1 each week.
Not ideal, obviously.
But outside of that one event you've pretty much reached the end of the current build.