"she should be naughty more often"!
I think there's possibly a couple of things going on - he may be less interested in the breast during the day because he's taking so many calories at night and really not motivated to feed properly (so a touch of the reverse cycling that Veggy is experiencing but not to her extent). It might also be that your letdown has been affected by a recent pumping session (I'm not sure how you are scheduling them) or perhaps your supply has been affected by less baby stimulation in relation to pumping stimulation.
I don't think your amounts of solids are a particular concern with only one regular meal a day (sometimes two) - it sounds as though you are putting a very high priority on milk.
However much more likely is a flow confusion issue due to the use of bottles. It sounds as though he might be beginning the feed and perhaps being frustrated by his need to achieve a letdown himself - it's just such a different feeding experience from the bottle and takes so much more work.
Dreamfeeds can be done with bottles or breast. Sometimes bottles are 'easier' because the milk just flows in and obviously for a sleepy baby that is a bit more straightforward but plenty of people on this board have done the dreamfeed with a breast.
I think your idea of cutting back on the bottles - as you can imagine from what I said earlier - is a good one. Or in a little longer you could find yourself only using bottles and exclusive pumping is extraordinarily hardwork (and not always possible to maintain). I don't think you need to cut solids out entirely but you could perhaps stick with lunchtime (as you really need him to be motivated on the breast in the evening when your supply may have taken a dip and needs his stimulation).
I think you've got a couple of options:
1. have an interim period where you try and promote breastfeeding a bit more (use the breast at night, use breast compression to make the breast less hardwork, try and get a letdown started just before he goes on) while at the same time making bottles less appealing (less milk in them, no1 teat if you are not using it already, making the position so he's a bit more upright.) You could also try and get hold of a haberman feeder where he will have to do the work to control the sucking as he does at the breast (some other bottles claim similiar things). While you are in this interim period consider yourself to be 'preparing' for the return to breast so have a real focus on boosting your supply - drinking well, pumping directly after feeds (not to collect milk for bottles but to send signals to increase production) and pumping as a substitute when he does take a bottle so your supply gets a boost at the same time. You could also take a herbal galactalogue like fenugreek:
http://www.kellymom.com/herbal/milksupply/fenugreek.htmlThen after a week or so of this aim to remove the bottle entirely for a while.
2. Or your other option is to put the bottles down now and have a 'breastfeeding honeymoon'. Don't attempt to do too much apart from nursing. Have lots of skin-to-skin time. It will be like a growth spurt for your supply and he will need to come off schedule and feed more frequently. Evenings are bound to be a bit tricky initially as he will be used to bottle and your supply will be at its lowest then - so again use breast compression, you may need to cluster feed, when both sides are finished return to the first side again (he will get a new letdown rich in hindmilk). If you choose this second option - stopping with the bottle suddenly you will see your supply bounce back more quickly but it might be slightly tougher in the short term.
I don't think you should stay away from the bottle forever - you want to make sure he doesn't go completely in the opposite direction and no longer take them. But when you do reintroduce them I would consider buying one of those flow controlled bottles that Tracy recommended (if you know he has a tendency to flow confusion).
