Will the I-5 be dropped?

Everything in due time.
As with all things, you build it, and find something that will work better. Technology gets more dynamic, and allows for more variations in the design.

If they shelved the H3, and continued to refine it's design, it would be an unbelieveably well built, agile, offroad vehicle.
But no one would have it yet.

The company put together the best they could for the price tag, and it works relly well.
Spend more money on design, and modifications, increase the price, and pass it along to the consumer. A better vehicle? you bet!

At some point you need to put a design into production to make money.