Especially for training - every few weeks I'll praise everyone training at above 7.5. If you could highlight multiple players and praise them all at once it would save a LOT of tedious clicking. The options would obviously be more limited as you couldn't address specific issues with each player but the general 'keep up the good work' etc options should work.
Could probably work for a few other interactions as well, like praising good form / criticising bad form.
Anything to eliminate repetitive unnecessary clicks!