I must admit, it's a lot shorter than I prefer for my dogs - I like to leave the feathering on body, legs and ears a lot longer - but we all have our different ideas of what looks best.
Re the eyelashes - I chop 'em off along with the whiskers and any other facial/head hair. That's the one part I like short, sleek and smooth. Whiskers, eyelashes and the dreaded topknot are a big no-no here.
If you want the eyelashes left long then it's up to you though Biscuit - the groomer should follow your instructions of what you want for your dog.
I clip the armpits with the 10F blade, if that's any help ( I've got Andis clippers though, so not sure if the blades are the same number for Wahl). For the knots in the leg feathering you could try a Mikki matsplitter and then brush daily with a slicker to prevent them returning. The splitter doesn't really 'split', it cuts - but it isn't quite as harsh a finish as using scissors or clippers... but if the knots are really dense and compacted, you just have to cut them all out unfortunatley.