According to that last paper you posted, spending can increase as retirees age because their life expectancy drops. Standard consumption patterns for retirees though show that spending is higher early on and decreases with age (assuming normal retirement age). That contradiction seems like a big problem.
Now assume you're a typical ERE convert and you're going to retire much earlier. I think that changes consumption patterns. For ER/ERE types, I think the pattern is different. I don't think people will spend more early on and spend less as they get older. At first, spending should be lower because they are physically capable of performing most tasks themselves (gardening, cutting the grass, home repairs) and they are usually healthier. As they age they might begin to pay people to perform these services. Under that scenario, ER/ERE seems to line up SWR (slowly increasing over time) with consumption (slowly increasing over time), unlike the first scenario with traditional retirees.
Another point in ERE's favor.