It's a matter of risk management. The longer BG levels are higher than normal, the more likely complications are likely to arise and the sooner they will come about. Is that risk acceptable to you? I would not be happy keeping my BG constantly higher than normal, I like my feet, my eyes, and my kidneys, it's almost as if they are a part of me
There are two elements to BG management, 1) your diet and 2) your exercise levels. You can find out how both affect your BG by testing. You will be able to see how your mid morning two rounds of sandwiches and 2 yoghurts affect your BG by taking a pre prandial reading and a post prandial. Is the difference acceptable?
Do this, for as long as your fingers can take it. Take readings before each meal, one hour after each meal, two hours after each meal, and before bed. Make a note of what you eat at each meal. You should be able to identify which foods affected your BG more than others, they will be the carbs, these are the ones to reduce, change or avoid.
It could be that you need to move input around, you say you have a small breakfast, it might need to be a little larger, reducing the need for a large mid-morning break, evenly distributing the input throughout the day rather than in different sized hits.
Part of your diet must be a realisation of what you do, are you in a sedentary job? or are you physically active? carb/calorie intake differs.
Seriously though, speak with your dietitian, talk to her about the various options low carb, moderate carb, low GI. You and I, we have to lose weight and maintain our BG, what we eat and what we do with that input has a lot to do with both.
Random thoughts from here on
carrots are a wonderful source of fibre and will fill you, also much lower in carbs than a slice of bread, and raw, they have a lower GI than bread too - meaning they'll leave you feeling full for longer, hummus makes a wonderful dip and is low GI and low carbs (I've found a great jalapeno pepper hummus that goes well with carrot).
Mrs. Tubs does a great pasta, tomato and courgette sauce which is bulky, and filling, and with wholemeal pasta can fall into low GI territory. Ms. Tubs eats it as well, which is a very good thing.
If you increase your fibre input you will need to drink more, otherwise you will become blocked, which makes everything much worse, believe me, been there, worn that particular t-shirt
Regards, Tubs.