You're looking at Smith through Homer glasses. Nothing he has done has ever suggested he can be a 40 point player, outside of 2 months of hockey that was 2+ years ago. Smith is going to be 26 years old by the end of the season. WYSIWYG.
I suggest you look at our friend Zack's career progression
http://www.eliteprospects.com/player.php?player=14495
Kid was never even ppg in junior. Never good enough to get drafted.
Then put up good offensive seasons in the AHL... then goes near ppg in the AHL playoffs when the Sens go on to win.
MAJOR progression and development here. He's a late bloomer.
The bottom line is, he's super talented and his basic hockey skills are all top notch. Shooting, skating, passing, puck handling, faceoffs, strength, it's all there. Everything.
Even at 25 years old he can still improve, obviously. Really in his first full year he produced at a 25 point pace, and it was the same last year in a shortened. He is by no means a lock to improve on that, but still, it's very possible that he does.
Especially if he gets away from playing with Chris Neil on the 4th line. Even if you think he's old, he still has potential.
Campbell has had better offensive seasons that Smith has (2 seasons where he outscored Smith's career best season so far), and he's what... 4 years older? Big whoop. Their career faceoff percentages are within 0.15% of eachother. Smith hits a little more often.
They are basically the same player, except Smith is 4 years younger.
Campbell is 30. That's 5 less years of hockey playing and has huge effect on trade value.
Campbell had 2 crazy offensive seasons (30ish points) that he will never ever repeat again. I'll be surprised if he ever hits 20 again. Meanwhile we KNOW Smith gives us at least 25.
Wait... you are suggesting here that the Oilers - a team that was so bad last year that they drafted 7th overall - would trade a 1st round pick (potentially still a lottery pick) for a guy who would be their 4th liner? And then you try to value him as a "potential 40 point guy"?
I'm not saying that they would.
I'm saying they could easily get into the playoffs this year (especially with Smith), and that pick is unlikely to be as valuable to them as Smith can. Mainly because Smith is a long term piece.
The chances a mid 1st rounder develops to be as good as Smith is actually not very good.
And DaCosta is supposed to be an asset for them because he'd be... what, their 5th center? Pressbox guy who gets 20 games a year?
they literally have no NHL depth. Gagner and RNH are out and he'd be their 1st line centre for now.
It makes no sense whatsoever. None. Even Holmgren wouldn't make that deal. I know it's awesome to like our players and pump their tires, but we need to at least keep one foot in the door of reality... expecting a 1st rounder for our 5th & 6th best centers is nothing short of main-boards, "Maple Leaf"-level homerism. Lots of teams could use an upgrade on their 4th line, but expecting them to pay a potential lottery-1st-rounder for it is nothing short of absurd.
Your problem is that you think of Smith as a 30 year old 4th liner. In that case, he is OBVIOUSLY not worth a 1st. the reality is that he's better than that.
I'm not saying the Oil would make the trade, or that any GM would make the trade. I'm saying Smith and SDC are more likely to help their team (this year and long term) than the guy they would pick.
If the pick ends up top 5, the Oilers look foolish and that risk is why 1st rounders don't get traded at this point in the year. Realistically though, the Oilers, with this trade, won't end up top 5.