Pros:
I consider the aesthetic appeal of a course to be one of the most important factors in rating it. After an 18 month closure and $10 million renovation, I'm pleased to say Mast Park has successfully transformed into a lovely piece of disc golfing property.
Native grasses now line the fairways. Landscaping enhancements have resulted in more elevation changes, and the removal of weeds and decaying trees improves the experience.
Additional amenities/upgrades include brand new Mach X baskets, 2 concrete tee pads per hole, and full color tee signs on both pads.
Navigation has always been intuitive, but now I feel the course layout is even better with a couple of the changes they've made, with a few holes being lengthened and others shortened. One of my favorite changes was to hole 6, which now requires a 400' anhyzer for birdie. Incredibly fun shot.
Cons:
Due to the novelty of the course, this is easily the most popular course in San Diego county. Hordes of people descended here over the holiday weekend, resulting in lengthy wait times. I'm sure the popularity will wane, but I expect this will be a very popular course for some time.
Mast Park used to be free to play, but it's now pay-to-play, $4 weekdays and $5 weekends. The rationale to charge players is understandable, as the fees are being used to offset course maintenance costs.
Many of the cons that applied to the previous version of the course still apply: Mast Park is a small piece of property with only 9 holes, and there are still too many short simple hyzer shots for those of us looking for more challenge.
There are also no trash cans located on the couse and only a few benches. More benches would be really appreciated because of the heat and the amount of waiting at each hole.
Other Thoughts:
Prior to construction, I had played Mast Park about 7-8 times and was never particularly fond of the course; it was a barren, dusty, weed-infested course with mostly short holes, minimal elevation change, and mostly unimaginative lines. If I had to give the previous version of Mast Park a rating, it would probably be a 2.0, so a 1.0 point upgrade to a 3.0 is significant, and is a testament to the changes made to the course. Well done!
10/16/21 UPDATE: After playing some excellent California courses recently, I've come to the realization that my original score of 3.5 was perhaps a bit too generous and I'm lowering the score to a 3.0 (Good), which I feel is more indicative of the quality of the course. I still feel that this is a much improved course after 18 months of construction and well worth a visit.