The current layout was in response to requests from a number of people. I get the impressoin that people are happy with it generally, but if there's a large 'outcry' I might post a poll to get some more definite figures of general opinion.
I prefer the subforums also especially beacuse there are very much forums, but maybe a page with a list with links to all the forums could be set up so one can go to any forum instantly.
Please make it a poll, I was very much in favor of the sub forum system, until I found out that when a new post is made in a sub-forum the little icon doesn't change for the top-level forum letting you know there is a new post. Very inconvient, so unless that's an option I would much prefer to go back.
I preferred it the old way, with all the forums listed on the main page, but it isn't really an issue for me since I usually just keep a page at each forum and hit refresh to see if there is anything new.
I prefer the subforums also especially beacuse there are very much forums, but maybe a page with a list with links to all the forums could be set up so one can go to any forum instantly.
A little something I just noticed this morning, scroll down the screen and you will see a little option called "Forum Jump" that lets you see all the forums at once and jump to the one you like.