Not lipamanka but after reading the rest of this thread I think I find this analysis sensible:
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lipu pu p25:
A verb is a word that expresses an action done to a noun. To form a sentence with a verb, follow this model: NOUN + li + VERB + e + NOUN
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Pigeonhole it -- there are only about 20 verbs given lexical definitions in lipu pu. All of these are transitive by definition.
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Intransitive presentations of true lexical verbs are similar to filling the objects with ijo, as per Polysemy testing - #16 by _at
As per Polysemy testing - #31 by magnap it may also be sensible to interpret what looks like an intransitive verb as an adjective filling the verb slot.