So, having owned both the first and second game on PS1, I've experienced both fully. While the first game had you making choices, being cautious, mashing buttons in cutscene QTEs and dodging the insta-kill T-Rex bite, the same isn't said for this one. In Dino Crisis 2, the first half of the game, if not the first two-thirds, can be dealt with by LITERALLY run and gunning. In fact, it's actually a great way to rack up Extinction Points early game as you can get No Damage bonuses easily this way. There's two characters now, Dylan and Regina, along with three turret sections, one "need NPC assistance" section, and underwater section, one escort mission (brief but it can be annoying all the same), and one tank section. Plus Dylan and Regina take unique paths due to their machete and stun rod, with Regina getting a number of puzzles that aren't just Dylan's "push button to do thing".
So why am I giving it three stars? Well... It's very much a matter of "Jack of all trades, master of none". The machete and stun rod have very limited use beyond being an attack, the puzzles mostly amount to "go back and forth collecting things", the underwater section has an annoying boss, the turret sections are just tacked on, the tank is one of many times a boss dinosaur will NOT be stunlocked (which also happens with the final boss, which can smack you upward of eight times and you can't do anything to dodge) so you WILL take damage all the time, the Extinction Points are used for an in-game store which is rather annoying to use (plus some items MUST be bought to progress, forcing you to grind for points to buy new items and ammo), and enemies have a bad habit of throwing you around the map.
And the story STARTS good, you go through time to try find survivors in a settlement that's go silent, but it never goes anywhere. A mystery girl? Quick summery of who she is at the very end, that's all. A surviving soldier? Pops up for a bit, pointless to the plot. Dylan's past? Lore dump with no conclusion. What happens at the ending? How did Regina get to the lab when she got split from Dylan? Where are the other mysterious people and why are their eyes glowing red if they're human? Who killed the baby triceratops cos, clearly, it was dead before the humans and raptors killed eachother? Why is there a missile silo in a POISON GAS FIELD!? Why did the helicopter your friend pilot randomly crash? There's so many questions, so many loose ends, and not a single one gets answered (worse still given we never got a major sequel, given Dino Stalkers was only kind of a sequel and Dino Crisis 3 was unrelated, we'll never have any kind of answer of resolution).
Dino Crisis 2 does have moments were it feels like a decent game, but it suffers from a major identity crisis. It wants to be an action game, but also can't decide how it wants to play so throws everything at the wall and hopes it sticks but accidentally throws the plot too and it ends up damaged. It's still alright, the cutscenes are good for the time and it still has one of the first instances of "aim and move" in a game with tank controls, but it lacks the polish and the direction the original game had.
I'm not gonna say to avoid it, you should try it, it's not bad. But I just wouldn't expect an amazing time because it has quite a few flaws.