Here's my take on the new games:
Mega Moolah
The 2 free spin rounds I got seemed to pay decent at $180 and $160 each, but that works out to 29x and 26x my $6.25 bet size, which is not the worst I've seen but is not exactly stunning. I don't like the jackpots and think the game would be better without them. And when the thing flashes every 2 seconds saying that someone won the jackpot, it does not say which jackpot they won, but it appears to me that it is supposed to (there is an extra space between "the" and "jackpot", leading me to believe that the type of jackpot that was won should be in between the spaces, but that the variable which is supposed to contain the name of the jackpot is empty or null).
Regarding the bug where the display of the jackpot values is below the stated minimum, that's just a cosmetic problem. The two times I hit the Mini jackpot were for $10.01 and $10.05, which I think means that the end result is correct, even if it doesn't appear to be. You can't take constantly-updating jackpot amounts at face value because it is impossible to display an accurate amount on every player's screen at the exact time at which the amount is accurate - but that doesn't excuse the apparent missing dollar from each jackpot.
Glory of Rome
Not bad. I like this one. As with most new MG games in their debut month, I hit the feature within the first 5 spins. I like that you automatically have 8 free spins, and that you're either going to get more spins or a decent amount from your four picks. From a $1 bet I got $40 right off the bat plus my 8 spins, plus whatever I got for having gotten the 3 scatters to trigger it. The second time I hit the feature I picked the Free Spins on 3 out of my 4 picks, which gave me 32 free spins altogether plus $10 from the other pick. I agree with Zoozie that having Roman numerals for 9 and 10 is a nice break from the standard. This one is my favorite of the four new slots released this month.
Summertime
The sequel to Spring Break, and bastard child of SunQuest. It does have one good thing about it: SunQuest never pays, so when I was playing this one I was expecting a 0% payback, but was pleasantly surprised to win $50 from a $2.25 bet for getting 4 bells (one was a kicker). I didn't get the free spins, but I didn't play for very long. Seeing all those SunQuest symbols was confusing.
Twin Samurai
I did not get such a good vibe from this game. It's not the theme I didn't like, it's that after a couple hundred spins, I never hit the feature. I got 2 scatters on reels 1&2, 1&3, and 2&3 plenty of times but could not get them on all 3 reels. And I only got a wild symbol 4 times out of all those spins - and of those 4, only twice did it help complete winning combinations. I finally realized that I am chasing a cheap 10 free spins at an even cheaper 2x multiplier - hardly worth the trouble. So I did not like this one, although I will probably be back for more at some point because it's still new.
Honorable Mention: 50-Hand All Aces
I agree that the $25 minimum bet is a bit steep but it's better than Lucky Nugget's $50 minimum bet for the 10-Hand All Aces version. Anyway I thought I would mention it because within about 10 hands I hit four 9s, then shortly afterward 4 Aces, and on the next hand, 4 threes. Went from a $70 bankroll to $360. I quickly left and blew it all on Mega Moolah.
I also like the Multi-Hand Vegas Downtown Gold because it has only 2 decks which can probably work in the player's favor under certain situations, although I really have no idea. I had pretty decent luck at it. The dealer kept busting. I like when that happens.