Lol you can't just invent things and call it consensus, or disregard actual sources as "histrionics" because what they say is inconvenient for you.
Here's actual consensus:
>With successful, strong mitigation measures, the experts expect a likely rise of 40-60 cm in this century and 60-100 cm by the year 2300. With unmitigated warming, however, the likely range is 70-120 cm by 2100 and two to three meters by the year 2300 [Source: http://www.sciencedirect.com/science/article/pii/S0277379113... ]
10-15 feet, or 2-3 meters, is the currently accepted consensus estimate of a worst case scenario (total polar ice melt). It's also conveniently the consensus estimate of historical water levels before the current ice age millions of years ago.
The water on Earth being 3 meters higher than today is not revolutionary, is not without precedent, and will absolutely certainly occur on this planet in the future.
Of course, once we warm enough for the arctic methane positive feedback loop to rapidly warm the climate, the worst case scenario becomes far more likely in the 100 year window instead of 300 year window. Only with strong mitigation does scientific consensus agree that we can delay the worst case 2-3m estimates caused by total polar ice melt.