I think it has a way to go before completion, and it updates slowly. Waiting for chapters never bothered me too much though. Heck, I'm still waiting patiently for the next chapter of Stargate Equestria... patiently... 4+ years now...
Hooves of Fate and Pink Eyes have already been recommended, so I'll recommend Project H.I.V.E. It's a wonderfully told story of the Changelings in the wasteland, and includes a few beautiful G1 references in it :)
I really wish I had written down my "kid-friendly" versions of the chapters that I "cleaned up" to read to my son back in the day, he loved hearing them and still calls Littlepip one of his favorite characters from any media, even though he's not really into pony stuff.
TV-Y is a great kid friendly FoE side story though.