Hi,
It would be remiss of me to suggest that the application itself is not important but it's entirely possible that what you write could come back to you at an interview later. Not that it WILL, that it might. It might be worth concentrating on your up coming tests. For me personally the first stage tests had a couple of tests which if I hadn't known about, would have tripped me up. Have a go at the bourdon test (plenty of tools available). Try the memory tests that come in the RSSB handbook for applying. Have a look here at some of the resources. I don't personally believe that you can train yourself to pass the tests. I do believe that you can increase your awareness of what's expected by practice and research and improve your chances of success.
Until you have completed the tests at both/all stages, it could be fair to say you could be just a number to the recruitment team. It's only when you have passed the tests and heading towards DMI that you surface to them. That's where your application might pop back up and the work you've put in now will come into it's own.
For me personally, I've got a start date with a TOC now. Through the process, I haven't had any questions asked of me that have related to my application that I could see. Like I say, it's possible the DM's may have read it and structured their questions based on what they read. Anything's possible I suppose.