Ok so I'm just gonna be honest like usual. I kind of like your old channel art better in some ways xD Your new design looks alright, maybe a 4/10 but there are certainly some improvements to be made. Using a free website it doesn't look too shabby, but since this is your channel art that represents yourself you want it to give a really cool first impression for new viewers, which this doesn't quite acheive if you ask me.I was in a hurry earlier so don't judge my mad MS Paint skillz please xD But yeah, here's what I highlighted...
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The layout was kind of all over the place, it looked a bit messy. Maybe you should try to clean it up a bit like this? V V V
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Cookie also made my channel art (which I love), I reccomend him if you have a little money to spend but if not I reccomend you try a different website or whatever as the one you are using now makes things look a bit, well.. crap.
That's just my opinion anyways, if you like it how you have it now then don't let me tell you any different : P I was in a bit of a rush when doodling these, so sorry they look so bad xD