I am having a lot of fun with Lorwolf, and am very much hoping it will succeed. I do think it's longitivity will completely depend on how things go moving forward.
Honestly I think /any/ new pet-sim is going to have an uphill battle to please folks with Flight Rising around as the gold standard. They've had what, 9+ years? To perfect game play/economic balancing and build up assets.
Not to mention players having time equity built up there. The pet sim world isn't the same as it was 9 years ago. Players see what a community values the most and might not “waste” their time on things that don't have that perceived community value. Like gen1/2 wolves being the main sellers.
Personally, I like the gameplay loop, almost always have something to do. Arena is fun when I have time, I love messing about with the gauntlet!
I think the economy is what will make or break things. I feel that we need more clothing options (or things in general) that use pebbles. I like that MS can be generated through game play but it it doesn't feel great having the “main” currency be premium. I want to dress my wolves up! I don't have 10+ dollars to spend on everone in my lair…
If the Lorwolf dev team shows the community as a whole that they're listening and making decisions in good faith I have hope. The site runs smoothly (as I've experienced anyway), the art is beautiful, the games so far are fun. They have a lot going for them!