I understand the argument for the "easy 80" and from whom/position the points will reasonably be scored. You make a very clear explanation.
My point is that the talent that will be sitting on the bench (only five can play at a time) will be making their case for more playing time when they are in the game. When they get more playing time together - whether with some or most of the starters, they will be working on being tough defenders within the half-court, jumping the passing lanes, blocking shots, and getting steals. Hustle plays generate more hustle plays, just like when Stewie was here, positive examples by the leaders teach the "youngsters" to hustle and attempt to win each possession on offense and defense. It's an attitude that is contagious.
Geno/CD can (and probably will) shutdown "primetime" by having the PG dribble around to burn time, but the defense will still be smothering. The UCONN attitude IMHO is that "we have worked hard to build this lead, let's not let it slip away!" Every possession and defensive effort are opportunities to learn for our young team. I believe they will learn quickly and be efficient and effective come January, 2021, such that very few teams will be able to hold them under 100 unless Geno, CD, et. al, shut them down. I envision that the "starters" will not play much in the 4th quarter [due to "blow outs"] against teams that are not in the top 25, but the UCONN second team will still be better than their opponent's first team. This will drop the "starters" minutes down to around thirty-ish, but as you said, 25 minutes for the starters is unrealistic, and the starters minutes will build again at tournament time.
Yes, they may score less than 80 from time to time, and they may have a bad game against one of the best teams in the nation (but still win 68-67 in OT), but that is why they call in an average...add 'em up, and divide by the number of data points..... I will never complain about the score (or lack thereof). I enjoy the variety of ways they continue to win. I, for one, will never get tried of them winning, as they are winners all!!!
The bottom line, I do not think scoring will be a problem for this group of women as they each become confident of their "piece of the puzzle" in the scheme of UCONN women's basketball.