Here's my $0.02's:
Every shade or flavor of flying has its short comings.
To me 'quality' of time means how many columns in my logbook can I fill with that one flight.
Hence my recommendation to my CPL students to do their timebuilding at night doing XC's on an IFR flightplan and flying lots of approaches.
I had European students add a column : IFR flightplan as their logging requirements are a little different.
How much learning is taking place during the accumulation of experience?
A 1000 times the same flight or 1000 different flights?
Back to your question:
You'll have a gazillion landings but apart from PIC and TT the 'quality' ( as described above) is limited as you're not gaining IFR experience and XC time. Same with banner towing and to a certain extend flight instructing also.
After 1000's of traffic patterns you plateau and stop learning also.
You already meet the hiring requirements of a company like PlaneSense.
You'll gain :
Multi crew experience
IFR ( filed and actual)
XC
Loads of approaches
135 experience.
My vote it's time to move on and it may not be a CFI that you should be looking for.
On a site note: the recruiter or HR persons may not give a hoot about your hours except TT but you will run into a wall during sim training if you're just scating on bare minimum experience.
Good luck whatever you decide.
Let us know.