If they're really not working for you then I'd try a couple of other different makes before giving up if you still like the idea of using cloth. Despite saying my Fuzzibunz leaked I am still using cloth nappies every day (and night) and love them as I have found other pocket nappies and two part systems (I use bamboo nappies with a wrap) have worked an absolute treat. In fact my workhorse nappies that I am constantly relying on now are my Little Lamb pocket nappies that I got on offer so were a bargin! I use the bamboo inserts that came with them and add an extra hemp insert underneath (so furthest from her bum iykwim) and this generally lasts her 3 hrs comfortably.
All babies are different (pee wise and shape) Maybe try some different inserts with the pockets you have first, i've never used fuzzis but we had Bumgenius and DD used to out pee the microfibre that came with them.
Having said that I don't use the Microfibre inserts that came with the Charlie Bananas as Microfibre just does nothing for my LO. I stuff them with the LL inserts and hemp, so it's definitely worth trying some different combinations to get the right absorbency.