Dude, if you put it that way, then of course there's no way we can question BB or any HC in any pro sports for that matter. I'm only assessing what I see on the field during games and in highlights/film breakdown that ESPN or NFL Network may show. There's no question BB has more data than any of us but having more data doesn't necessarily mean making the right decision. There may be salary implications (Aikens costing more than Slater), and personal feelings (Slater may have endeared BB because of his hard work). Who really knows what the thought process was, but based on what I've seen, Slater is useless unless you want someone to run full speed into somebody else.
No, its not that you can't question anything, its that you cant question anything without a reasonable argument and be taken seriously.
When Bill Belichick cuts Aiken and keeps Slater and you say "Aiken is better than Slater" and give no explanation why, or in what role you see him better, or anything you look like a bufoon.
If your argument was that you think that at some point the 53rd player on the roster, who is being kept solely for special teams, will need to contribute on offense or defense, or if you think that Aikens experience is important, or just anything with any fact to it, you could possibly be taken seriously. As it is, you sound like you are crying because you like the guy cut and dont like the guy kept for some odd reasons.
To say that what you saw on TV or ESPN is even 2% of the necessary information to evaluate a special teams player is silly. There is no way you can evaluate a st guy from TV film, even if you tried to focus on him, and st players, except for returnmen arent being shown or analyzed on ESPN.
I know you think that since Slater f-ed up a kick return once, he should be banished from the team, but it doesnt work that way. Returning kicks is not the skill that has him on the team. The skills are being the gunner on the punt team, playing a key role on the kickoff team, blocking on the punt return and kickoff return team, and to a small extent having the ability to play in an emergency situation on both sides of the ball.
If you want to be taken seriously, make an actual fact based argument. If you want to be seen as throwing a temper tantrum because you wish another guy made the team, carry on.