In my opinion we simply do not have enough information at the moment to make a good educated guess as to how much this split is going to affect her. It's not a question of forgetting how to play tennis, obviously, but rather a matter of how much emotional "scarring" such an event might leave on the player. There have been a few cases where a particularly acrimonious split affected a player's career spectacularly (Grönefeld comes to mind). I'm not saying anything like that is going to happen to Vika, of course, but they HAVE been together for a long time and I think it's too early to guess what the fallout (if any) will be. It depends on many factors, like how close the two persons were off the court, whether the decision was consensual or not, whether it was premeditated or sudden, etc.
I thought i was pessimistic, but i highly doubt Vika will ever fall to that sort of depth some of her haters are
predicting because Vaidisova's slump was the mother of all slumps and a bit of a freak case. ALG was already beginning to slump for a few months even before she decided to split with her coach, so you can't put her form down to just the split itself. There are many more cases where changing coaches haven't resulted in a slump of epic proportions than have. Emotional scarring?
that's putting it a bit extreme - she's just stopped working with Antonio, he hasn't died
As i said in the chat thread a couple of days ago, i got the impression Vika wasn't enjoying working with Antonio anymore towards the end of the season from her body language after the way she used to give him no eye contact and lean away from him when he came on court to talk to her. I wasn't impressed with his advice either, particularly when he told her just to just roll her first serve in when serving for the match at a time when she was losing most of the long rallies and she went on to lose the match on quite a few occasions
Vika's a professional though and needs to move on now. Her results may or may not be great to begin with as she gets used to the new idea's, but when she step's on court the old partnership with Antonio should be the last thing on her mind.