Rush the church
with your starting section so this doesnt happen.
Attacking the fuel
If youre gonna do this, bring your vickers with you so your sections dont get bodied.
Relying on those AT sections was ballsy and led to you floating waiting on 2cp. Really as brits you always need the AT gun before you buy any emplacement(unless its the advanced emplacement bofors)or the sniper. Without it, and then the follow up mortar pit, the brit early game is just way too weedy.
really just as I watch this game..I ponder and wonder, Why no emplacements? playing without them, makes it really much more difficult than it needs to be.
They're your indirect, your anti garrison, your anti stalemate, your 100 range schewer hq. They prevent your expensive infantry from bleeding more than they need to. They're everything. They're the essence of life itself.
Your float gave me cancer
You seem to be allergic to making economic choices, last time I watched your replay, you did the same thing.
You had 800-900 manpower forever. Buy some caches. Buy a doggone emplacement.
one pit here where the Sync error message is couldve covered the middle vp top VP and munitions, basically winning you the game.
Probably couldve slapped their cutoff with a few 3 inch shells too.
Im not saying buy advanced emplacements doc and spam emplacements like a **** head, but god bless, at least get 1 pit each.
The first emplacement didnt come up until doggone near the 40 min mark and it was from ur teammate. Naturally, it got vet 3 in like 45 seconds and gave decent influence over the middle.
Yeah you had the most kills, most damage and won the game but losing 241 models, leading the game in units lost as BRITS vs OKW and ostheer is unheard of. even during losses. The ostheer player picked a super bad doctrine as well and basically threw the game, in my opinion. even though to be fair he made an epic play on your sniper with his stg stormtroopers.
Just buy a pit or two and literally that game would've ended in your favor in 25 mins flat.
To answer your questions,
Is Special Weapons a competitive commander?
Yes
Is it worth using "Hold the line" or offmap arty?
the arty offmap is one of the best HQ killers in the game. It doesnt kill them outright anymore but it still leaves them pretty lit.
I was always starved for munitions so didn't try either ability.
Probably because you let them have double muni all game because you didnt go pits or even muni caches 
Are the UKF grenades always as bad as they seemed to be in this match?
If you ever tech british nades over a cache and emplacements ever again im gonna reach through your computer screen and slap you with a noodle. Pretend section nades dont exist.
I lost a bunch of Cromwells. Should I have tried getting some Comets out?
See above...get some damn pits out
I used tank hunter infantry a lot. Are they normally considered okay?
Pair them with pyrotechnics supplies instead of the medic upgtade and you got yourself a quality AT squad
Also ONE final thing, I direct you to another brick of text
Test the build orders here for your early game.