Don't have any criticisms at all. The venue was in need of a small upgrade on the watering/cleaning/bathing services front, but only by need of convenience for handling child-related upkeep!
Scrapping the Beatles cover band next door might be a good one for next year! 
The percussion did become overwhelming at times, though that was testament to the rising energy - I really giggled at Mick trying to bring the wave of a jam down in volume, and then watched as he failed and the vibe took hold again and everyone got louder and straight back into it again!!
There's so many possibilities for the event that the mind boggles. In all honesty, as was proven by Sunrise this year, small is often more beautiful. Intimacy is key - knowing and meeting everyone else is a major plus - plus a safe environment for the kiddies.
If there's any help or advice, or infrastructure or contacts you need for a slightly bigger event, I can certainly help or pass on the relevant contacts. We're been there a few times now! so I certainly have some insight into events of a slightly bigger nature. 
I would suggest a max of 250-300 people though, otherwise you'll lose the intimacy and risk the underbelly of trouble-makers that can revolve around larger events.
Very noteworthy was the VALUE! Don't raise the costs too much. £30 a person would be prime. At the end of a season, it's nice to come to the ultimate wind-down.
Likewise, keep the food affordable and people will be sooo much happier - I hate the daylight robbery of Festival food - and Lin obviously worked hard but I hoped she made a good chunk for her efforts.
You could have two venues, one for hanghang and quiet, non-percussive only and another as it was this time - where cross-fusion and anything goes rule - though actually, I think most people might agree that it worked best with no rules! It's a hard call to make, and actually a voice is saying to me that letting freedom rule is probably much more the way. Also, having two venues may fragment the small number of attendees, and having everyone together makes it feel much more like a family.
Venue room itself could be a bit bigger, but only to allow a few more people in - other than that, it was a lovely room and served the purpose really well.
Big hugs to Rob & Kelly (and families) for their efforts and all who helped. Do get well soon and don't be sad - it will happen again and you'll experience all the magic!
Regards the Levellers - anytime mate - glad it was so well-timed...
xxx