I had a lot of fun on both maps during the Beta, but I’m a fan of bright, sunny maps, so I’d have to say Regret is my personal favorite between the two (plus, I had fun trying out the Hydra), but I really like Truth, too, lots of fun. :]
If I’m totally honest I really think this map didn’t suit halo 5 gameplay at all because of the adjustments they made to the map due to sprint and clamber 
I want the Truth and nothing but the Truth.
Neither, it was too open for Halo 5’s gameplay style. Also too big, waaay too big.
Heck, I was amazed I was playing a variant of midship that had me constantly searching for people to fight.
I thought Regret was pretty fun. Truth just didn’t feel right compared to Midship, Heretic, or even Zealot.
I liked Truth and Regret, but they needed a bit more power weapons/power ups.