Here are a couple of tips to students where to find existing feature requests and already fleshed out suggestions for new functions for Kodi that been repeatable asked for before;
Other than the Team-Kodi proposal ideas on that GSoC 2017 wiki page, the first tip is the Feature Request forum found => http://forum.kodi.tv/forumdisplay.php?fid=9
However one big downside to Feature Request forum is that got a huge amount of threads/posts, and many threads are have the same ideas or posts are not really fleshed out.
That leaves the second tip on where to find idea, which I think is better, and that is the development forum and more specifically GSoC subforums for the previous years:
Other than the ideas that will be posted here in the GSOC 2017 subforum, you should really check out the ideas and proposals that did not get picked up:
GSOC 2017 subforum => http://forum.kodi.tv/forumdisplay.php?fid=274
GSOC 2016 subforum => http://forum.kodi.tv/forumdisplay.php?fid=257
GSOC 2015 subforum => http://forum.kodi.tv/forumdisplay.php?fid=220
GSOC 2014 subforum => http://forum.kodi.tv/forumdisplay.php?fid=207
GSOC 2013 subforum => http://forum.kodi.tv/forumdisplay.php?fid=191
GSOC 2012 subforum => http://forum.kodi.tv/forumdisplay.php?fid=161
If you have already used Kodi you will notice that many of those older suggestions and proposals are still great ideas but was never realized and has not been implemented yet.
Then there is of course the main development forum which also have many projects which was started but never finished, many of which would be picked up again by yourself.
Check it out here => http://forum.kodi.tv/forumdisplay.php?fid=93
As you can see there in the main development forum, many, many projects for Kodi even have some proof-of-concept code but was abandoned when developers gone M.I.A.