Jemster It sounds like you're really fed up, although it does seem to me like you've made a really good start. A lot of us have found that when you revisit an area you've already done, you often find more things that you can get rid of. I think decluttering is self-perpetuating, the relief as things leave the house makes you want to get rid of more! It can be frustratingly slow if you don't have much time, I'd love to have a massive blitz on the spare room, but with a toddler running around it's not possible, so it has to be little & often.
I definitely think you should box up some of the extra mugs and crockery. It makes room in the cupboards, and encourages you to wash the pots more often, because you need them clean so you can re-use them. This in turn means there is never a huge, daunting stack of washing up.
That said, I've done naff all decluttering recently. I am going to have to re-think the kitchen layout, as DP and I are getting married and mum is very kindly buying us a food mixer as a wedding gift, and she thinks my aunt will be buying us a breadmaker. I anticipate (and hope!) that both of these will be used very regularly, and will need to live on the worktop, which means I need to make space. My tea / coffee / sugar jars currently live on the worktop, as do my pasta & rice, in nice glass storage jars, but they might all have to be re-homed in cupboards. I am quite attached to my storage jars, but realistically, the pasta and rice can stay in the bags they come in. Maybe. Split bags and spilled contents really irritate me.