Ok some comments in no particular order. I'll hopefully be doing the army on vassal soon as marines are one of the easier armies to play with on that accursed program.
Units
Characters
Is the lack of Leader intentional to fit with the 25 point cost or a misprint? If its intentional the army is crippled right there. Any assault based army is stuffed if it carries bm's. And any army relying on Rhinos for tranport is doubly so. Basically all I have to do to ensure a formation has bms for the rest of that turn and the next is shoot a rhino. That is pure poison for marines, especially ones that aren't going to be shooting much. If you want cheaper heros drop everything bar Leader, the oposite ain't good. Though to start with maybe just drop invulnerable save, after all they don't live forever

I would drop Battle Leaders. Rational is only the Wolf Lord has impressed the boys enough to ensure any would follow. Others just leader their own packs.
Alternatively could go for making him a cheap Hero of 25 points with just Leader, the others being more expensive with Leader + x, or the others being leaderless and the formations being able to take 2 heros.
Finally another option is a variation on what you have now and have every formation come with a battle leader who just grants leader and then the option of taking a second Hero as an upgrade (who wouldn't have leader).
Can you give the runepriest teleport. No in game effect in this list, would just be for possible 13th company shenanigans in the future.
Troops
Wolf Scouts. Currently they are Imperial Guard stormtroopers. Should they be a bit better?
Blood Claws/swiftclaws
I really don't agree with the FF. They carry both less weapons than regular marines and are worse shots. A bunch of DA assault marines should win a firefight with a bunch of Space Wolf assault marines as the latter are crap shots and lack all the plasma and melta weaponry, same with the bikes.
Fenris wolves
Is it a misprint they have a 5+ armour save (as there is no + sign after the five and its hard to see why they are tougher than Orks!)
Land Raider
Can't carry blood claws?
Army List
Armour. Not tempted to make a warband of tanks? 4-6 tanks, hunter upgrade? Something like Land Raider 85 points, Predator Annihilator 70, Predator Destructor 65, Vindicator 55, 4-6, upgrades Hunter, hero (representing iron Fathers etc), Vindicator.
Various points like vindicators for 300 I guess are typos and you intend to actually match the EpicUK costs?
Skyclaws upgrade. Just make it a flat 50 points for the formation? Otherwise its basically 60 points as there is little reason to take just 1 jump pack (only reason being I think getting a spare transport slot, but may as well buy a razorback for that). Still is it worth it? 360 points for 6 assault marines. A regular army could get 8 in a thunderhawk for 350.
Going with the possible downstating for blood claws FF (see above) maybe you could have 2 core formations a blood claw one and a grey hunter one? 25 points difference between them say? On points in general I reckon you could easily get away with 6 grey hunters for 275 (some think normal tacticals should cost that) with a hero with just leader and that would be a good assault formation.
I don't think long fangs are an automatic choice. Personally for general purpose work I think 3 razorbacks are better and more survivable.
I would recommend trying 0-1 long fang unit can be added to any formation of grey hunters for 75. Thats more of a balance with razors and other upgrades.
More whittering later probably.
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