Some of the more annoying things about Google keyboard, is when swipe fails to activate.
I think swiping is really pivotal to mobile input. I've been tempted to run some analysis and try find a keyboard layout that minimises errors, gives greater accuracy and speed of input, etc. But it is a big project. I want to keep the 3 row layout/size as well, just rearrange the keys for swiping. ( I have seen some keyboards try to promise effective swiping but they are too obtuse and different for me to feel comfortable with using rather than just rearranging qwerty)
Review of FUTO: It's alright. The swiping has a little bit of inaccuracy but that is just due to noticing it versus Google's data harvesting. The voice input is also something that I use and it seems okay with Futo but it relies on me saying the whole sentence which it will then analyze and put in the grammar. That is pretty good and it does a really good job of it. I am used to voice talking and correcting as I go, so this will be something to get used to. All in all, I like it. And I will try it for a little while.