there are 2 javese pdf viewers (apdfviewer) and fbreader. +lcd+eink. I would not include any of this in the rom as they can be installed at later stage by the user. while the stock modified browser is good as displays text and html files on e-ink properly, I would not include the others as they will have future versions.
also there is in forum some discussion to include modified rights for e-ink drivers, I can not find now the post.
also I do not know if a rooted and unrooted ermine golden should be provided. I personally prefer rooted, so I think efforts should not be put on a non rooted golden full rom as those can unroot their version