Liked the review, but I’d disagree about her needing more mobility. I’ve been playing her basically whenever she escapes the bans, so I’ve seen plenty of cases where her basic kit isn’t quite enough mobility, but if I’m willing to sacrifice just a bit of burst damage, then Frostburn really helps. Since her B hits everything in a wide arc, it’s great for slowing a whole enemy team, making Anka comparatively faster. Using her A for the teleport both slows her target (with FB) and give her a burst of speed, and between the two it’s enough for quick hit and runs even against heroes like Krul or Reim. Clockwork also helps her mobility quite a bit (and allows you to build Journey Boots instead of Halcyon Chargers) since it reduces the cooldowns on her abilities.
I don’t always build FB for Anka (and build CW even less), but I tend to make it my first item when I think the enemy is going to try to control my mobility. It’s lower burst damage is somewhat compensated for by its lower cost and being able to build it earlier.
I actually consider her one of the best designed characters in the game just because she forces some choices like that.