Hi Emma,
I'm the diabetic rather than my kids, but I was diagnosed at 11 months old, way back when 2 injections was the norm... I relatively recently (last year!!) got my mitts on a pump & they'd have to knock me out to get it back now! For about 10 years or so prior to that I was on a version of MDI (multiple daily injections) but only got on a DAFNE (Dose Adjustment For Normal Eating - sorry lots of acronyms!) in 2004, so spend years muddling along without a very clear idea of exactly how to tweak things...not brilliant! It sounds like Paul going on to the pump has at least been really good from the point of view of understanding diabetes better, which can only be good. 🙂
I know that getting basal rates right can be quite a challenge & can imagine how much harder it must be doing that for a small kid who's activity patterns / growth spurts will be unpredictable etc... but I honestly think if you can crack the pattern spotting & tweaking, you will achieve soooo much better control on the pump! 🙂 Also if you can stick with it I think Paul's quality of life will be much better too - for example when he starts school he will be able to bolus more accurately for snack times / meal times etc as & when he wants, & adjust for sports etc too, so he won't end up being the 'diabetic kid' in the corner who has to eat at 11am (or whenever) every day whether they are hungry or not etc... and I know little things like that can make / have made a huge difference to how I feel about my diabetes...
I know it's really really hard work, & I often humbled & amazed by the dedication of the mums & dads on this forum to their kids health - but as someone who's had D for 32+ years now, with not too much wrong to date, I can tell you the hard work pays off & your kids will be grateful for it. So is a pump worth it? I would say definitely, yes! Hard work, but much much better results when it cooperates! There are a lot of wonderful parents here & on CWD email list who will be able to offer more 'useful' advice, but I just wanted to encourage you - it sounds like you are doing an amazingly difficult job really well.
Wishing you both all the very best,
Twitchy xxx