Thinking on the information shared by Shiina, and the speculation that the Komari route be rewritten to somehow include Rin, it is still my opinion that the fourth or fifth episode is still too soon. Realistically, from Rin and Riki's standpoint, they aren't even "Friends" yet. It'd take some major bonding before that to establish at least Rin's relationship.
And as we all know, the bond between Komari and Rin is the strongest among the girls. The anime has to make it so or the spoiler route will take a major blow.
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Within each of us a thousand worlds
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