It’s a shame that Dorsett can’t return punts.
Dorsett had 25 PR and 25 KR in four season at U of Miami, and he wasn't very good at either.
Reedy was a very good KR at Toledo, and also pretty decent in 29 PR. He was also solid on both KR (20.7 avg) & PR (10.2 avg) with Tampa earlier this season. In his 2 games with the Pats, he had 4 PR for only 32 yds total (8.0 avg) and a long of 13. He was, however, scrupulously careful with the football, so that's a plus.
McCarron had only 5 KR in 4 seasons at Iowa, but a spectacular 30.7 avg. He had only 19 PR and didn't do much with those until his senior year when he had 7 for 148 yds (21.1 yd avg).
Cy Jones also had limited return touches in three seasons at 'Bama:
... 10 KR, 25.0 avg ... 8 PR, 7.6 avg as a freshman
... No returns as a Soph.
... 4 KR, 19.3 avg ... 4 PR, 20.5 avg as a junior
The Pats only two legit PRs - Edelman and Amendola - will be 32 and 33 years old in 2018.
BB values the return game, but has also made it clear on more than one occasion that he wants to avoid using a roster spot on a dedicated returner who isn't able to contribute much in other ways.
That's probably mostly why Reedy was let go. OTOH, Reedy was a pretty decent receiver for four years in Toledo and did well running the ball on limited occasions. He also showed a hint of some ability at both earlier this season in Tampa, so he may end up back on the PS in a week or two for further evaluation/development on a futures contract in 2018.
Still, the lack of a legit PR may be becoming an issue, unless Cy Jones can recover from his ACL in 2018, AND improve on his previous performance (or lack thereof). I suspect that at least a couple of BB's 2018 UDFA DBs and WRs will have had some significant college PR experience.