an isokinetic machine can be used to give object measures on specific muscle strength. some larger physio practices may have them. the regional hospital where i work has one too, never used tho... waste of money to be honest! Anyway! Dont worry about it too much.

I wouldnt be too concerned with the swelling on your knee. i doubt its enough to interfere with muscle function and control.

I'd keep going with all the non contact aspects. slowly introduce contact play. continue with strengthening- core, hips, knees. Loads of balance and proprioception exercises. Sorry, but I assume you've had the acl repaired in the same knee twice yea? not opposite knee? If its the same knee I'd say your doing very well.

dont rush back. i was training for quite a while before i felt i was ready to play competitively. its still early in the year!