Absolutely. Gotta go with the best option for the situation. If you're chasing down a RB from the opposite side of the field and he sees you before you get to him, running in a straight line to lay him out isn't going to work. That's a situation where you've got to play your angle, and get the guy on the ground. At the least, slow him down or make him cut in towards your help.
A big evolution in the game is how fast, but also big and strong even the most finesse positions on the field are now (WR's and QB's are bigger then ever, and RB's are built more like LB's to withstand the pounding of a season). Players think that they get one shot at getting these athletes down, so they're going to go 110% in one direction and hope for the best.
One thing I've noticed more and more over the years is guys not tackling and not hitting, but turtling and taking out a player by basically diving into his knees. We all know a DB isn't nearly as big as a TE or a RB, so they're going to have to go low the majority of the time to make sure they get these guys down. I've felt like this "tackling" technique is the easiest to 1) read and 2) break out of. Typically, if a guy is going to turtle, it's in the open field as it's usually a DB and they're the last line of defense. So if the ballcarrier has time and space, it should allow him an adequate opening to judge the situation and either leap the defender (and with how low some of these guys go, it doesn't even have to be a hurtle) or juke him out of his jock as the defender breaks down into a diving/falling motion. I've just never liked this form of tackling, unless absolutely necessary and/or on occasion to throw another variable into the tackling equation.
Like I've said, taking the best angle to the ball and knowing where your help is so once you get to the ball, then at least slowing down the ballcarrier or forcing him in a different direction is effective as well. Not technically part of the tackling, but all the things leading up to it.
And damn it, you can't overpursue. This one kills me. How many times have you seen a defender get in the right position quickly, then one quick jab or cut by the ballcarrier, and all that hard work to get in position is for naught as the defender slides by, caught overrunning the play. Once again, you have to know where your help is. If the ballcarrier is right along the sidelines, yeah, not a bad idea to use the sideline (sideline never missed a tackle as they told us back when I played in HS) as a crutch and cut off the ballcarrier's forward direction and force him back into the middle of the field where you presumably have your help defense. Otherwise, you can get there as quickly as you like, but if you don't do the right thing when you do get to the spot when it's defender vs. ballcarrier, then you've taken yourself out of the play.
I do think we're going to see better form tackling with the league cracking down on the huge body-exploding hits. I've noticed it every now and then, DB's pulling up to avoid the fine (not to mention the 15-yard penalty) and instead just making sure the receiver just gets on the turf. It's a tough balance in that situation between making a play or going safe, so I sympathize with the players in this situation. But if it means we'll be able to watch great receivers for longer as they're not being blown up and injured, I'm for it. Big hits are exhilarating, but I'm also concerned about the players health too, especially with what's coming out about concussions and the trauma it causes. This isn't Madden when you're using a virtual avatar of a player, these guys are human and do need to be protected. And trust me, the game can still be just as physical and gladiator-esque as it's always been. I heard plenty of pads popping on Sunday. It's still football, just a bit lighter (and safer) version of it.