hi =) she looks like a nice example of a TB, she has no unicorn horn like the 2 ex racers I know, lol.
Anyhoo, her neck looks in proportion, just need muscle building on it to give her a topline, which will also improve her bum which looks a bit lacking in muscle, to do this i'd lunge her in side reins if she's used to this, but put them lower down than usual, this will encourage her to work in a lower outline and help build up the top line muscle, also, if she could be fed her hay and feed off the floor this would help aswell =)
Aside from that she looks nice, her legs look clean and flat in the piccies although in one she ooked slightly behind at the knee but not in others =/
Her hooves and fetlocks are at the correct angle and also look in proportion, not too long or short.
Nice looking mare you have there =)