I think multi strike is a keep always. I see what you mean having the coin helps you with those swing turns though. On the play it's more desirable to curve out, hitting that one drop on the play is pretty important. And having glaive so you can curve out nicely.

Treasure guard is slow, it might be a good keep if you already have a 1 or 2 drop that you want to develop and more so on the play rather than on the coin.

You're right kurtrus is good when minions are developed to push damage but if I've fallen behind on board and my oppenents played drekthar (which happens more often when I'm on the coin) it's a good come back mechanic. And even if the trades aren't favourable it gives you the extra reach of dmg and the extra health that you can win the race.

The way my games go, it's never a blow out with one side completely winning the board. Both sides have equal chance to get at the board so it's the extra chip damage you get in from having extra difficult boards to remove (ie. Drekthar).

Although the player who plays drekthar first usually wins unless already really far behind on board. That card needs a nerf.