Oh, i didn't see that could be a problem, lol. For me, IP is nice, but i still want to leave it, storage or not.
Not sure if this is what you meant, but IIRC, the tutorial quest (and some other quests in IP), do encourage exploration.
Lovely idea, i often hang out in IP and having working storage there would be great. i also don't see an issue with any increased harvesting activity, like someone already mentioned, it would be great to have more people in IP, showing new players that the game is active and perhaps having more interaction between new and old players.