Thanks,
Regarding optimization of your landing page, you probably should be spending more time working on the product. The formula for a good landing page is never entirely clear, but as long as you have your basic value-proposition you will attract good potential users. After you have your value prop identified and stated, optimization becomes an exercise in representing it in ways that appeal to the greatest number of people.
The feel of the site is slightly better than average. It's not bad, but the person who designed it either didn't spend much time on it or didn't understand good design principles (or both). But for a landing page (which is temporary), I think this is more than sufficient. If you have the resources to throw away (I'd first ask, why do you have resources to throw away?), then go ahead and do more with this site. But you really should be focusing on getting that product shipped.