Pretty much all the races in Volo's guide could really use a redo. It feels like they weren't playtested at all before being churned out-- they decided to make the first draft of the random thoughts and wonky abilities getting spit up onto the page and then rushed out for print.
Because that PC crunch aspect... its just terrible. The fluff is at least good, but those PC races... pretty much every one could use being redone. But they are never going to be fixed. Not in official material. That's got to wait 10 years for 6th edition.
But-- hey-- if you play at an independent table, you can homebrew. Maybe once the wonky abilities are fixed and a few touch-ups are done, you can put thought into what abilities should be removed and swapable for different tribes of Kobolds.
It actually helps in a way that Kobolds are actually considerably underpowered for a PC race. It means you have to add something to get them on par with other PC races, which means that can be something that can be different based on the subrace.