"Majority shareholder Billy Bowie hopes final planning approval for their Bowie Park training facility will be granted so work can begin in the spring.

Kilmarnock hope their women's team will be based there by the end of next year.
The centre will have two full-size pitches, a training complex and a 250-seat stand, and be the youth academy's home as well as Kilmarnock Women's."

This might be the reason they can go back to grass. They would still have playing and training facilities for the youth and woman's teams, and also rent out the astro for friendlies, five- a sides etc. when free. Keeping the grass pitch damage free.