Well, Ulrich has really summed up what I came back to say.
I always used to have a link to DWDS and to other dictionaries in "Favorites", but since I got a new computer I haven't got around to collecting them all again yet. As far as the i-button is concerned, I can't say I did actually know that it can lead to DWDS, other than subliminally, since the only times I've used an i-button, I've wanted to check on declension and have clicked straightaway on Konjugation/Deklination without glancing at the other options (shame on me;-)). So, it wasn't until yesterday that I needed to look in what to me (and now Ulrich) was the obvious place for such a link.
BTW, I've just noticed a discrepancy in the English and German information on the i-button in Search Tips/Suchtipps:
"the i-links provide links to additional information for an entry (such as word definition, pronunciation, grammar, etc.)"
"Diese Links führen zu Informationen, die Sie für ein Ergebnis zusätzlich abrufen können (Aussprache, Grammatik, u. ä.)".
No prizes for guessing that I use the German version of the dictionary and forum rather than the English version...
So, I'd suggest making the German version consistent with the English here at some stage.