Absolutely.It's all about adding subtle complexities (leave the in-ya-face stuff to the brewers of APA's ).
Indeed, some bitters are not very bitter at all.With the hops it's a similar story. Good quality hops, usually Golding and Fuggle, are used to give a nice bittering, with good flavour and aroma. The trick is to be balanced. By their very nature a Bitter should be just that, but not to the extent of some American hop monsters.
Very true, though (as I said) one shouldn't really be using a single variety of hops.In theory these are very simple beers, because they rely on so few ingredients, but in practice they can be quite difficult because you can't hide your mistakes behind a huge malt bill or hop schedule. It can be a bit tricky not to make a one dimensional beer when you are only using 2 grains and a single variety of hops with an OG of 1.038.