I reckon Watson to Brighton will happen this summer. It was only lack of replacement that stopped it happening in January, that wont be an issue in the summer
Hume still has 3 years so we are well positioned on that one. Mundle having just come back from a long injury will probably mean clubs wait another year before any serious approaches.
Wouldnt be a great move for him with the wingers they already have. Realistically he should stay for another year of regular first team football.