After lollipop update Google HO notifications are annoying

Jul 9, 2015
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Before lollipop update, if someone sent you a message in google hangouts, it would appear in the top bar, line by line.

Now after lollipop, a big overlay popup in the top of the screen, interfering with games or whatnot you happen to be doing, it is very annoying to say the least.

Please say there is a way to make it go back to the top bar like it was pre lollipop, without going all custom ROM/root and what not :)