Yes, the first place you have to show the increased APR is the closing disclosure. There is no tolerance test on the interest rate or APR (or payment schedule reflecteing them) between the LE and the CloD. Yes, you can proceed to close.
The product change is only a changed circumstance if it increases a fee in excess of the applicable tolerance limitation. In this case, there was no such change.
If the change occurred after the CloD was issued (rare, but it could happen), you'd have to issue a revised CloD with the increased rate, APR and payment schedule and reschedule closing so that the revised CloD is received three BD's before consummation.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8