If there is no lag between your actual position and the vehicle indicator on the GPS map then do not update to 2.22. I had no problem updating to 2.22. But now my position on the GPS lags behind my actual position. I will be on an off-ramp before the GPS tells me I need to take the off-ramp. The "ping" sounds as I drive down the off-ramp. I am by an intersection before the GPS map shows me at the intersection, so the turn indicator comes too late to notify me of the turn.
I hope it is still under warranty. I have never heard of that. My 1470 looks the same whether it is routing or not.
It is possible to get them to pay for your return shipping. I would think that after 3 times, they would be willing to do that. I had a mix up with them on a unit. They sent me a return label. They sent me the number and FedEx accepted it and Magellan paid for shipping. I don't think they ever volunteer that information. But they may do it.