ARE YOU REFERRING TO PRECHECK WHEN YOU SAY "TSA?"
TSA is a government agency that handles all airport security. Precheck is a voluntary program that you go through a background check to have expedited screening. They are not the same. Reserve still has you go through the standard TSA screening, the Precheck level of screening is not available using Reserve.
Depending on when the last time was you flew out of MSP Terminal 1, the fact that Precheck sometimes took longer than the standard lines was because of Clear, not any issues with Precheck. Until about 6 months ago, Precheck without Clear passengers would only be allowed through the ID checker if there were no Precheck with Clear passengers in line. Precheck with Clear now has it's own line and on many occasions Precheck without Clear is faster than Precheck with Clear since so many Delta frequent flyers get Clear for free or very cheap. Precheck with Clear also has it's own line at MCO.
I have a co worker that we fly out together almost every business trip to MCO, he has Precheck and Clear, I have Precheck. He is usually through TSA at MCO in about 8 minutes, I'm through in about 12. Normal security at that time us generally 45.
In my opinion, there is no way I am going to give up Precheck, to use Reserve. I really like not taking my electronics out of my bag, keeping my shoes on, going through the metal detector rather than the mm wave scanner, not having all of my toiletries in a one quart ziploc and not having to take that ziploc out for them to screen separately.
My recommendation is to have the one knucklehead that doesn't have Precheck to sign up for it before your trip. It's now down to $78 for five years and many credit cards will pay for it. There are four enrollment centers in the Minneapolis area, Bloomington, MSP, Little Canada and Fridley. Precheck can be received in as little as two days from application.