Your Interlingua portal changes
Why do you think it is impossible to find ? I've just moved it upper on the page where it is even more visible than before. Or which page are your talking about if that's not this portal? There's never been any "letter headings" in the portal itself, as there was no glossary there, except in a separate subpage. If you speak about headings, those changes were in Portal:Ia/Consistentia in traduction (whose link in the Portal:Ia is proeminent, and emphasized in bold, may be you want it to be even bigger? It was not big before).
The glossary was never in a separate subpage, you're the one who moved it there. I'm going to undo that now as I do not like this change and I do not see any good reason for it.
OK, but this is very different from other "portals" that, as their name imply should just be a colelction of ressources. All other languages manage subpages for various things, and notably the glossary which is very expansible. It also uses a consequent size in the summary. That's why I placed the strong link to the glossary just below the summary. And I also linked this glossary to other glossaries (there are new ones including one new which is fully translatable across all languages. There are also multiple glossaries for specific projects (not Wikimedia or Mediawiki), that your revert will now hide. For maintenance purpose, your revert will be moredifficult to manage consistantly. It is the creation of cross-language glossaries that motivated the separation of your glossary in a separate subpage, making the portal what it was at its origin: a portal for all ressources. Some portals ontain a few additional sections but they are much more limited in goals, and when these extensions become consequent, they all use separate pages.