'MIU Album' and 'LA (Light Album)' are certainly not among their better albums.
'MIU Album' was recorded during a feud between Mike and Al on one side and Carl and Dennis on the other side, with a very fragile Brian being stuck in the middle. As a result, this is mostly a Love/Jardine project. Brian contributes his share of compositions and vocals, but they're all far below his earlier standards. Carl and Dennis hardly have any input at all. I honestly can't say that anything on this album is particularly terrible, it's all listenable, but nothing is really good either. It's background music. Which is kind of painful if you realize that the same group was responsible for 'Pet Sounds' and 'Smile' just a decade earlier.
'LA (Light Album)' is a bit better. At least Carl and Dennis are back on board. Dennis even contributes a couple of songs that were originally intended for his unreleased second solo album. I think 'Good Timin'', 'Lady Lynda' and 'Baby Blue' are good songs, definately among the best song the group released after the mid 70s. Most of the other songs here are kind of boring though. The disco version of 'Here Comes the Night' is really not that bad for what it is, but it should've been about 8 minutes shorter...