I don't think that's right. Given that the Trump reflation/aggressive Fed trade is done mostly through downside in various LIBOR products, the mkt is actually quite long LIBOR/OIS spread at the moment (this is also due to large longs in swapspreads).Yes. There is severe over crowding in the short end of yield curve trade (2/10)s and even 3mo/2yr, these players are holding that front end down and will get destroyed if and when the Libor/OIS spread blows out. When you look back in 2008 when the spread went from 50 bps to over 400 you didn't have near this amount of activity short the front end of the curve. I think funds got too aggressive on the trump reflation trade and now they are stuck holding size in these things. It's probably still a good trade but they are affording one the opportunity to put this on very cheap. Sure beats the hell out of owning downside index protection.
IMHO, LIBOR/OIS isn't going to be a good hedge at the moment. If anything, you can observe the opposite, as the some of the pain recently came from an unexpected tightening of various bases (quarter end was a total damp squib).
In Europe you could argue that BOR/EONIA basis is too tight, but it does nothing but tighten further as there is too much excess liquidity.