What happened to Taco Bueno?

I used to love Taco Bueno, it was my favorite fast food and I would eat there 2-3 times a week. I changed jobs and there wasn't a location near the new job so it had been a few weeks before i went back on a weekend. It was awful. The pico was all mashed up looking it didn't look like the freshly made fresh chunky yummy pico. The cheese topping on the tacos was white and yellow and the meat seasoning was awful. The shells even had a different taste. Ok maybe it was an off day. I've been back a few times and to other locations and I'll give them this. It is consistent, but it's obviously been revamped and now it's horrible. Does anyone have the reason why they too such a great place and made it like everyone else? I can't believe I'd rather have Taco Bell or Taco Casa.