1. More range & payload, always.
2. My $10k Toyota doesn't leak, even in a monsoon. Your $6bazillion SK76 pours water on me in a light mist. FIX THIS!
3. More power. The same thing happens to every helicopter - it comes out with a max gross wt. The customers complain about too little payload & range, so the gross wt gets raised. This continues until at max gross at sea level, it will barely fly. So, put in a bigger engine, & goto start. Repeat. There really isn't a solution here, except for putting in the bigger engine at the start.
4. More range & payload
5. More range & payload. I'm tired of flying IFR at the ragged edge of legality & safety. I have to fly IFR 150-200NM out offshore, & the current crop of helicopters don't cut it. This requirement isn't going away, it's just going to get larger & longer.