MAX10 for 5V LVTTL interface

I want to understand from the learned user that can I use MAX10 in below mentioned scenario...

1. MAX10 is configured as OD 3.3 LVTTL logic, with PCI clamp diode enabled.
2. The IO pins are configured as bidirectional.
3. The interface which is talking to MAX10 is a 5V LVTTL interface, but I have made sure that VIH, VOH, VIL and VOL are compatible.
4. The VCCIO power pin is also supplied with 3.3 +/-1% voltage so that max clamp voltage at IO pad when PCI diode is active can reach max of 4.06V.
5. I have also understood that during POR and configuration period HOT Socketing circuitry shall function to save IO pads on getting full 5V swing.
6. Also, absolute max ratings recommend that if IO are getting max of 4.12V as 100% duty cycle, they can still continue to operate for more than 11 years.

What I want to get confirm if this kind of operation has any drawbacks which I didn't considered, as Altera is nowhere saying the device can operate at 5V in any of their used case.

This being unconventional approach I don't have any scenario to prove the risk-free working.

Or if any one of you can point me to correct reference design /document