There are more levels, the majority of them being smaller linear traditional sneaking levels where you go from point A to point B. That is not Hitman. As far as actual Hitman levels go there's only around 3-4 and they are VERY small (remember the strip club?). Due to those insanely tiny levels that means by default there are less kill options for each target, any more and they would have been virtually stacked on top of each other in the levels.
As I said though, the actual number of targets between the games leans in BM's direction by as little as three targets. Remember the levels in BM where you had several targets? It's like the difference between a single mission. Minimal. There is really no less 'traditional' hitman in the game, just more non traditional in the form of A- B level runs, which exist in Absolution because of their - admittedly poor - attempt at weaving an actual narrative into the game. It ultimately wasn't for the benefit of the series if that is the best they can do, but the A-B runs being built around that, without having less levels or targets than previous entries, means it is additional, not in place of. I have no issue with that, because it means the game still delivers what was traditional, while actually trying to do something new.
If you truly believe there are less kill options for targets than BM, then I would suggest to take a look at the challenges each map with a target has on Absolution. It is simply incorrect to say BM has more, factually.
You're confusing the actual number of targets as a bulletpoint that actually means something by itself when there are other factors at play though. Take the Saints mission for example, what is there...7 targets in that level? Sounds impressive right? However, because of how tiny the sections of that level are and how linear the mission is there's no more than a few kills for each one. Some have even less than that. It's like that in a lot of the linear levels where you have targets. The amount of targets in a level actually harms the kill amount because the more there are packed in to those tiny levels, the less kills for each they're able to implement.
The good news (I guess) is you got the worst game out of the way already, your Hitman experience can only go up from here.
Play Silent Assassin and especially Blood Money. The latter is considered one of the best stealth games of all time. No they don't have good stories but they have great gameplay that few games have ever tried to mimic and they both embarrass Absolution. You'll quickly find out just how linear Absolution was and how little choice there really was in the few legitimate Hitman areas it had.
Factually incorrect from a gameplay point of view. There's less kill options, less traditional Hitman levels, smaller levels overall, disguise system is completely non functional in Absolution. It's not even a contest.
the contract multiplayer