Sgt Hammer Overpower

I have one question for this latest patch… 49.2
I have been playing HOTS for a very long time… And i was just wondering… Why buffing Sgt Hammer? She is very difficult and annoying already to deal with if you account the escape mechanism, defense, very long range, enough fast basic attacks, that are very strong enough… I remember when there were matches where we could not do her any harm because of lots of reasons(team composition, her general stats and abilities…) and game became impossible to win. Especially if they get exp advantage because of that what she can do, and if she is guarded well also. Even I when play some heroes that don’t have mechanisms for escape, i get away somehow and restore myself, be more careful and so on… This is too much, by my opinion. I was already thinking ways to somehow stabilize some stats or something (like attack speed, when changing from siege mode to mobile mode to have cooldown, like 2 seconds…), and now this came? Just tell me Why? Thanks in advance!