Anything but. From all I've heard, Tom and Lalla's divorce in the early 80's made the Beatles' breakup look serene in comparison, and there's still
a lot of bad blood between them even today. Ward'll gladly play Romana and work with Leeson again (and has, in the Gallifrey
spinoff series as well as several Companion Chronicles and a few of the later Doctor's audio episodes), but not with Tom.
And as bad as that is, you still have a much better chance of getting Baker and Ward in the same room again than you EVER will with Ward and Waterhouse.