Prestige 2 IAQ wiring question

Hello. Here in OH my system is a heat pump with 3 electric strips. I eliminate strip heat as much as possible but there are occasions of bitterly-cold temps where they must be engaged. Historically, I isolated W1 from jumpered W2-W3 and took control via the t-stat when to engage W1 and W2, allowing the sequencer to control W3 (at least I'm guessing that's the correct terminology and how it's controlled). So now before I wire the Prestige I have two questions:

1. Would you suggest I remove the jumper to W3 at the air handler and connect it to U1 on the EIM, or would you consider it not a huge deal unless it runs xhours per month?

2. The manual states to wire a maximum of 2 sensors using S1-S4. I will definitely wire 2 sensors to measure Delta T but I also had the impression in my feeble mind that I could wire up-to two more temp sensors. Can you educate me on this?

Thank you