Carlos said we should start a new thread for homepage suggestions.....so its all his fault!
Please take the following as just my suggestions....which are in no way meant to be criticisms. I'm just trying to get the ideas flowing.
I think the first thing to try to work out is what message the website is trying to convey. I think its supposed to be about PixInsight. But its not clear....it seems to be about Pleiades and a Spanish software development company. It doesn't seem to mention astrophotography processing anywhere prominant. I can remember the very first time I came across this site....I thought it was some university based organisation project. It was only when I went back to it for about the third time that I realised there was something I could download and was aimed at me. The upfront talk of "Open-Architecture Image Processing Platform" and "Advanced Development Framework" frankly scared me off!
Don't get me wrong, the above is all very important and needs to be on the site....but its not the main message. So what is the main message?
I think the main message is something like "PixInsight - Cutting Edge Astronomical Image Processing Software". Then some major features / benefits....maybe just five. Then some words saying that this is more than just static software...its a dynamic collaboration between like minded astrophotographers (amateur and professional) who are pushing the bounds of astronomical image processing using the most powerful tools available, that new tools are being created continuously by an ever growing community and that if you download the software you can become part of this project (I hate the word 'project' but I can't think of a better one right now).
That might be all you need on the homepage. Then have links to other pages....Features / Benefits, The Core, How Can I Join In (PCL Framework), The Roadmap, Recent Developments (Recent Processes, New Scripts, etc), The WIKI, Pleiades Astrophoto, Downloads, etc.
The more I look at the site I think that most of the information is there, it just isn't clear on the Homepage. Its got too much cluttered info which detracts from the main message. If the homepage was revamped, and maybe the menu structure / order changed along the side, then this would help a lot.
That's my two pennies worth.