Ah, what an excellent route. I was sort of disappointed with the ending, but it was still good.
Regarding the order of the routes, I think it works out well. Fate's Shirou has his ideal, and he just goes with it blindly, without really thinking about it. UBW's Shirou sees the flaws in his ideal, but despite that, he still sticks with it. HF's Shirou abandons his ideal completely, just protecting those he loves. My favorite Shirou is HF's, since he makes the choices that I'd make, but I fully understand people disliking him 'cause he's basically allowing evil stuff to happen. I think the difference between HF's Shirou and a true villain is that Shirou recognizes that he's sinning by letting Sakura live, and he intends to atone for it, and to make her atone for what she's done as well. So, he's basically taking responsibility for protecting those he loves.
The way that Archer's arm was rejecting Shirou's different ideal was also pretty cool, and I found it interesting how HF's Shirou can't use Unlimited Blade Works, since his inner world is not Archer's. I sort of wish that Shirou had gotten more GAR, though. Killing the corrupted Berserker was about as awesome as he got - after that, he was practically dead weight. That's probably why I found the end sort of bland.
Regarding Archer, doesn't it seem likely that the timeline that created him was the Heaven's Feel route, but with Shirou choosing to become a superhero by killing Sakura?
Regarding Saber, I really wish she had gotten more development in this route. Once the Shadow attacks her, it's just like "POW, Saber's evil now, you must fight!" It never really explains what's going on in her head. Then again, maybe I'm just bitter since trying to save her led to a bad end.
I wish Gilgamesh had been involved more as well. It's irritating that his goal of possessing Saber only exists in the Fate route. It would've been beyond awesome if Gilgamesh ended up on Shirou's side, working with him to get Saber back from the Shadow - so many cool scenarios could come from that.
Kotomine was awesome, of course. There's not much that I need to say here. It's hilarious that the true final fight of Fate/Stay Night was just a fistfight between two half-dead dudes. Also, a cautionary tale on how the Pro-Life agenda can be taken a bit too far...
One last thing: how exactly did Zouken make True Assassin burst from Kojirou?
Oh, and stop using spoiler tags, the thread itself is marked.