Given how programs are taking away benefits these days and basically watering down elite tiers, you're asking for alot for $350 vs the current Ambassador at $200.
For $150 more you're asking for the minibar benefit (granted, some hotels are including this 'benefit' these days at rates $50-75 more per night over the lowest rate). Keep in mind that RA has some high qualification standards and even a RA referral in CC will run >$500.
If anything, this tier would probably be priced closer to $500+. But we can only dream. The double upgrade would just cause them to create even more levels of room categories. That is one game that cannot be beat 100% of the time.