There has already been a topic on this, but since there's been no official reply, why the sudden change in lay-out? And will you give the option to switch back?
I have really been trying to like the new lay out with the spaced out words, but it disrupts my learning process and of several others. Similarly when you read a book, you do not read letter individually; you see them as clusters that interact. If the issue of guessing is the reason, I don't think it's necessarily a bad thing that our brains get 'used' to the length of the word as it is a part of the learning process.