Looks like you can field all the new marine units as any chapter. I wonder how you'd figure the bladeguard into the Dark Angels, that only has Terminator armour as first company troops? Just paint them green and call them an elite bodyguard squad from whichever other company your officer is from? Kinda thinking of restarting my Dark Angels with this lot.
I don't mind people not fielding troops but I'd much rather they were required to at least field a 'standard building block' component of whatever the declared theme is. Like, with White Scars and Ravenwing, sure, bike squads are troops. Declare a first company army? Termies are troops. Want an Aspect Warrior army or an entire Striking Scorpion shrine? Fine, all troops. Imperial Guard tank company? Fine. But I'm not keen on 'anything goes' where there's no troops and no theme and it's just a random collection of the most powerful models. That was the best part of the detachment template to me, not the restrictions, but the guidance to make a force look roughly coherent in that a commander had clearly attached a way of handling everything rather than being given a mission to deploy to a planet for a year and arsehole lieutenant going 'yeah, fuck tactical flexibility, I'm just taking all the biggest guns and our entire high command staff!' :D
I've played against both very weak and very powerful themed lists and enjoyed both as at least it tells a story while you are playing, rather than a force that has just been number-crunched for how to abuse the intent of the rules in whatever edition.
In that sense, a variety of detachment templates, covering everything from recon forces to armoured forces, tactical all-round battlegroups and patrols to faction specialisations like Deathwing/Ravenwing only etc, actually helps the goal of increased narrative play as theme contributes to narrative. A narrative suggesting that a large mishmash marine force can take the field without a tactical/intercessor trooper with a boltgun in sight, or 'anything goes', seems to work against that.
