Cuándo se tiene más de aprender? Are there going to be new lessons? I'd like to learn conjugation in an easier way. I also appreciated it in the past when we made progress and we got kudos from the owl! It's been a bit humdrum lately.
After you've completed the course, there isn't anything to do with the same skill (not including strengthening and reviving weak material). I'm not exactly sure of when another version of the Spanish for English speakers skill tree will come out, but until then, starting the reverse tree can be an enormous help for practicing vocabulary and learning the language better. Whatever you choose to do, good luck!
I wonder whether adding a set of "Spanish 2" lessons to Duolingo is even feasible. Like you, I've been in maintenance mode for quite a while now; my motive is to keep my Spanish from deteriorating too much until I start cramming before my next trip to a Spanish-speaking country. I do four lessons a day just to keep from falling behind. Suppose the amount of material were doubled by adding second-semester lessons. Would we then have to spend even more time -- perhaps eight lessons a day -- to keep from falling behind? It seems that Duolingo will never conclude that you've "got it" once and for all. It seems to have decided that you're going to forget everything sooner or later.
I see what you mean about conjugations -- a few scattered examples won't teach you all the regular and irregular conjugations -- present indicative, gerund, past participle, preterite, imperfect, future, conditional, present subjunctive, past subjunctive and imperative. Luckily, the number of verbs you need to know is a lot less than the number of nouns. Take a look at the book "501 Spanish Verbs." While waiting in airports, I sometimes review for an hour or so the Spanish conjugations in the appendix of my Langenscheidt's Pocket Dictionary.