Don't understand the logic.
1. If you want to support your current seniors, you give them ALL of an option of taking the extra year and wait for them to respond. You are effectively constrained from looking for 5th year transfers because your roster may be 25% bigger next year (like Syracuse with 45 players next year), so there isn't any room for extra players. How many college ADs in this current environment are OK with expanding rosters of non-revenue sports teams by 25%? How many college ADs are OK with expanding the lacrosse roster by even 1 additional player for next year?

2. If you want to win, you keep your current seniors who are impact players as well as simultaneously recruiting impact players from other programs. You have to start recruiting transfers almost immediately. Top talent isn't easy to recruit, and they quickly find new homes if they want to transfer to a new school. For example, the men's lacrosse transfer market has already taken most of the top names 5th year seniors off the board within the first month that the NCAA announced 5th year eligibility. You keep very few role playing seniors on your team because their presence inhibits your ability to groom your team's young talent who coming up from behind.

Not sure how you do both effectively.