Yea, for the most part I don't know why anyone would use short ester test in the offseason. I know Skip Hill and a couple of other coaches like a long / short mix...although I think I've even heard Skip saying he still only shoots the prop around 3x per week.
Maybe I'm lazy

I just like pinning 3x per week, partly as a means to prevent myself from going completely off the rails with doses, lol. I'm such a creature of habit that the status quo of M/W/F pins locks me into, "I can't take more than what I can get from 9cc per week." And with Test and EQ at 300 mg/mL and Primo at 200, that's still a lot IMO.
I may try prop at the latter end of prep next time around, purely to make quick adjustments. Outside of that scenario...if anything I would veer towards more frequent injections but still with long esters to really smooth out blood levels, if e2 or DHT were problems.