Poloniex is the best alt exchange, imho, and a real model for how crypto should be - they have good programmers there, they tend to focus on high-quality, innovative coins before anyone else does (not garbage clone coins) and they seem to be a lot better at hard-core development and coding/integrating new coin codes than anyone else.
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I can definitely relate to that statement. At one point, I wrote a trading bot and notice a slight quirk with their API -- it wasn't handling request/response headers with the properly casing as per the RFC spec. I reported this to busoni and he got it fixed, so yeah very good in the development and support department there.
Compare this with bittrex where I told them they need to change their max trading quantity to be based on how much btc value is being traded rather than the altcoin as a unit of account. Their response was basically that's how their system is designed and to fuck off -- much more politely of course but just amounting to generic lip service.
Comparing something that isn't RFC compliant versus something that is your personal preference hardly seems fair. We made a design decision and we choose that paradigm. There is hardly anything wrong with that. When something of ours isn't RFC compliant and doesn't get fix, please do let me know.
PS. busoni and tf2 are rockstars. +1