Personally, we did not look at tax +-. For us, it is about creating an entity which could be managed by a fiduciary if needed. In a way, just like setting up an entity over a sole prop. While we expect the named persons to outlive us, one cannot be certain. The remaining heirs could be as yet unborn, or will not be of age, so we are more comfortable having a fiduciary if the named trustees are not willing or able. In our case, we expect to have to rewrite again once I get to FRA, so we can sort of preplan that into the framework to reduce the amount of change. What we are finding is the trust items will likely not change, but the remainder (will items, kept under the CA small estate level) will likely change several times.
In the case of CA real property holders, unless one expects the property to be sold, there are issues with Prop 19 to deal with. The practical effects are still being fleshed out. Sadly, we had to be somewhat precedent setting, needing to get a (as much as possible) binding letter for out situation.
The nice thing, for us at least, is the estate industry seems to have gone to a flat fee model, or a subscription model, with few going the hourly route. The subscription model is very interesting for those on the younger side, who may need multiple changes and monitoring by their experts.
I am a bit biased though, after having to sped a couple of years cleaning up two intertwined intestate estates... Even a simple one paragraph will would have saved the estates more than $10k each.