Remember that autocomplete and autocorrect are two different things. I myself have not found autocomplete useful at all. I'm the type who just starts typing away, so I notice a lot of people talking about autocomplete and I'm in confusion. Do you guys stare at the keyboard and pause typing to look at the choices and then figure out which one works best? Basically a type, stop mid-word, look, choose the next word?
I was going to post the exact same thing, that it seems that a lot of people are confusing the terms autocorrect and autocomplete (which is really 'next word prediction', what Swiftkey is great with).
Anyway, my answer to your question is yes, but the way you said it sounds terrible, while in my case with the help of Swiftkey, it's awesome.
Now that I have established my language pattern with Swiftkey for a couple of years (it has cloud sync so I don't have to reestablish it after a factory reset or phone upgrade), I only needed to type the first 2 or 3 letters of a word and then I just hit the space bar to complete the word. During typing, my eyes are mostly on the prediction bar instead of the keyboard (yes, Swiftkey accounts for inaccurate fingers). If the middle bar shows the exact word I wanted to use (which happens in most cases) then I immediately hit space bar to complete that word and move on with the next word. If it doesn't, my eyes automatically glanced to the left and right bar, and if it's one of those, I just tap that word manually. If none are there, then I type one more letter until I got it (at this point it's extremely rare that I get to type a whole word). Remember, this process is in a split of a second while I'm continuously typing without stopping, e.g.: tap tap space bar, tap tap space bar, tap tap tap left prediction bar, tap tap space bar, etc.
So, just like you, I also just 'type away', it's just that my eyes are on the prediction bar instead of the keyboard and I do not expect to have to type the whole word. Instead, I rely on Swiftkey's excellent word prediction and simply hit either the space bar or left/right prediction bar to complete my word before I move on to the next word. It's really amazing if you have gotten used to it.
Now, in addition to the above, the coolest thing about this is that I use dual language and switch languages extremely often. It is not uncommon for me to switch and use words from different language back and forth in the middle of a sentence. With Swiftkey you can activate both dictionaries at the same time, so it recognized when I tend to switch language and use words from other language, and when to switch back to English and provide me with the correct predictions almost all the time! This is what got me hooked and could not leave Swiftkey.
Of course, it is not for everyone and I understand that. I just wanted to give a description of what's going on when you type by relying on 'next word prediction'. The other way around is true to me as well, after I've gotten used to Swiftkey, typing on my iPod Touch with iOS autocorrect turned on is an absolute torture. I ended up turning off autocorrect and had to force myself to type really slowly, tapping every single letter carefully.