Yes, ASO is my host. When A Small Orange was originally acquired from its founder back in 2010, it was purchased by the same guy who owned HostGator. We were assured that A Small Orange would be operated as a separate company and target a little higher end of the hosting market than HostGator did (which targets the absolute cheapskates in the industry who want to use as much resources as possible for next to nothing). For the most part, ASO was operated as a separate company, at least as far as what we customers experienced. And to be honest, after being acquired it got even better than it was before. Overall, it was a good acquisition. No complaints and only praise thus far.
When I read that HostGator was sold, I was a bit fearful. But I've read nothing and heard nothing about ASO going to EIG. Just the thought makes me feel sick (seriously). A Small Orange is only a tiny fraction of the size of HostGator. I don't even know if EIG would be interested in a relatively small host. Companies like EIG are looking for mass and scale and usually don't bother with smaller players. Big companies don't usually expend the time and resources to buy small players. Not to mention that EIG tends to target a different (lower) market segment than ASO does and it would be serious mismatch. One reason ASO customers are with the company is because it isn't like Go Daddy or EIG. An EIG acquisition would not go over well with ASO customers.
I, like you, have been reading complaints about HostGator on various web hosting boards recently. HostGator was (and still is) an overseller and I don't think anybody serious about hosting would ever host on an overseller. But as far as oversellers went, HostGator got mostly positive reviews and had some very enthusiastic customers, until recently. Having hosted on two oversellers, I would never do business with any company that offers "unlimited" or a ridiculously huge amount of resources because some customers will indeed try to take advantage of that and quality will suffer. You can't have 150 or 500 or more customers on a shared server all trying to use unlimited resources and data transfer. You can't. There is a limit to how many requests a server can process and how much data it can transfer.
All I know is that there is a huge difference between a good hosting company and a bad one. When you got a good host, you want it to stay that way forever. But the nature of the hosting industry is that companies are started, they grow, and then they are sold to larger competitors. I don't like it, but that is the way it is. I'm keeping my fingers crossed.