My problems with Target Alpha and Solar City are two fold.
They altered the drain lanes a bit to increase ball time. Which is why it is very possible to complete all 15 targets in one ball when it typically takes more than 5 on El Dorado.
Which leads to my second dislike. Once you have all the targets down, there isn't anything left to shoot for (directly) other than to keep sending the ball up right in hopes of EB or special.
If set ultra conservative, it might make for a decent competition game. But I am a man verses Machine type of player.
Big Indian/Brave offer a good mix of things to shoot for. And the Vari Target offers a good risk vs reward with the 5000 and 5 bonus advances which can result in 15,000 for a single shot on last ball (Bonus double). But often results in a fight to save a SDTM ball.