I confess to being not savvy in most instances in college sports...I just enjoy the games and what was once a bit of purity in the game at the college level as opposed to the professional (but that has evaporated quickly in the last couple of years)....But, in the case of players declaring for the drafts, does doing so automatically remove the person from the college program/scholarship? If not, and the player is not taken by the pro league, does the campus program have to allow the player to return? If the player is allowed to return to the college program, what emotional/psychological detriment for the individual and the teammates would that create?
a player may declare for the nba, go through the evaluation process which could mean being invited to pre-draft camps and working out against other possible draftees, and in the end be given an evaluation of how they are projected as an nba player.
as long as they don't sign with an agent they are eligible to return to play ncaa ball if they opt to pull their name for the draft. i can't speak to what would happen if a player stays in the draft and isn't taken, but i am sure somehow here can clarify that point for you.
in regards to the detriment of the player if they are told they don't measure up yet i am not sure how that is a bad thing. consider if that with each time you applied for a job you were given a clear and concise review of your strengths, weaknesses, and where you need to improve to make yourself more marketable?
finally, in regards to their relationship with their teammates i don't see how that would be skewed and in response to the program this is something schools have been dealing with for several years now so this isn't something new to ncaa basketball.