That's a darn good analysis, macattack.
I'm inclined to agree with you. I think a KPNT-like sound would be good for WAAF. However, I think WAAF should steer clear of artists such as Coldplay and Tom Petty. Frankly, texturally speaking, a KPNT-like approach would be similar to the music direction the station took in the late 90's and early 00's.
In terms of filling in analog coverage gaps for WAAF's programming, I wonder if a translator station for WEEI-HD2 would be viable? I realize the FM dial in that part of New England is very cluttered, so I have no idea if any open/viable channels even exist.
Both KPNT and WCYY play Petty in circumstantial situations... KPNT keeps Petty restricted to "Wayback at 6/Wayback Weekend" programming that is heavily 90's-based, while WCYY keeps a couple of Petty songs on light rotation. What's the same between them are the chosen songs... "Change of Heart", "Mary Jane's Last Dance", "You Wreck Me", "You Don't Know How It Feels", "Out in the Cold", "Runnin' Down a Dream", and the immortal "American Girl". They are highly specific choices, and leave out a huge chunk of Petty's hits.
KPNT plays a lot of Counting Crows, Blues Traveler, Gin Blossoms, and Wallflowers during "Wayback" programming, and those specific Petty songs blend in well with that kind of roots-y alternative rock, plus KPNT also likes to fit Black Crowes into the "Wayback" segments as well. WCYY keeps both Petty and Black Crowes on light rotation, and I suspect it's because of Portland's dominant music station, classic rocker WBLM, which routinely gets 10 shares. They probably spin Petty and Black Crowes to get the attention of more impatient WBLM listeners during commercial breaks, and maybe they might get those listeners to stick around for 10-20 minutes and hear what else they have to offer. That's just my guess for WCYY's logic.
That being said, Coldplay was just an example of a softer artist that I came up with at 2 in the morning, I would agree to leave them out of a hybrid playlist realistically. Black Keys, The Head in the Heart, Cold War Kids, even Lana Del Rey (who is getting spun by KFMA in addition to KPNT and WCYY) are better "softer" choices for a hybrid format. More indie rock, less indie pop (though Twenty-One Pilots is probably unavoidable).
What do you and others think of Vermont's The Point (WNCS Montpelier and its statewide network)? It has the present/past mix macattack noted in his hybrid examples, but could be short on the active rock "kick" suggested for such stations. Of course, largely rural Vermont has a much different musical and lifestyle vibe to it than MetroWest and Boston do, so maybe the mellower approach is a response to the nature of the market. Can you see the format working on a Boston-area station as currently done (with Boston-area bands taking the place of Vermont bands on the playlist) or would a much harder approach be appropriate?
Boston's most famous non-rap artists include Aerosmith, Boston, Godsmack, Dropkick Murphys, Letters to Cleo (albeit they're more of a one-hit wonder nationally), Powerman 5000, Ice Nine Kills, The Lemonheads... The only "mellow" artist that's really broken out is Guster. Sad to say this, but a Boston alt probably needs quite a bit of active rock spice.