From what I've read here it seems that Oak in particular encounter more problems than the other colours so I wouldn't be too worried about your Ink.
and I think because your Alexa is the regular size, it really won't get too overstuffed like an OS would because of the smaller space. If I had been aware of these flaws of the Oak OS, I would've gotten either the black or grape regular instead which were the other colour choices when I got the bag last December.
LOL funny story! I guess there are a lot of people out there who don't really mind buying a "flawed" bag as long as it's authentic and functional. The buyer of my bag was only concerned of its authenticity and didn't mind the flaws that have been nagging my peace of mind ever since I became aware of them. Another man's meat is another man's poison indeed!