good Argo summary AKA Chip, by and large i agree with you.
a few things i'd add/amend:
-you asked what the starting O-Line is, likely from left to right it goes: Washington, Eppele, Keeping, Parenteau/Reinders, Van Zeyl with Smith as the key NI backup. i also think that you damned Washington with faint praise a bit. he was monstrous for us and his addition to the line (after Barker saw that his hopes of 5 NIs wasn't viable) was one of the main reasons the offence started to gel. Milanovich wants a forcefield around Ray like the one he had for AC. we'll see.
-the addition of Pre (to the PR) was more of a non-confidence vote in Anthony Alix than in Swayze Waters. it's not like the plan is to dress Pre.
-not sure what else McCune would have to do to earn your (and other reviewers i have seen) respect. the guy was rock solid all year. if the reason is his age, i get what you're saying... but nobody who is on the team is questioning his athleticism. the man looks like Godzilla.
-Jones has always used heavy rotation on the D-Line. there was a lot of fresh blood brought in to compete in TC. we all know what Mitchell is able to do. Williams is legit and fans will get to know this guy. i reckon that Lee and Laing will get a fair share at DE too. we weren't overwhelming on D-Line last season, except for one guy... and i see that being the case again this year.
-in the secondary, we're known commodities at the corners (Watkins and Carter, who filled in for Watkins against Mtl and Calg in the playoffs), and Matt Black has taken over the quarterback-in-the-secondary role to raves from coaches and players. the rest? well, the best of them broke his ankle in the 2nd preseason game... looks like it's on Gatlin and Robinson to round out the crew.
-will they find more Ball and Horne types? i believe they already have found a pair of very promising prospects.