...they aren't bad, just aren't class leaders...
I'm not sure how I exactly feel about such assertions.
This goes back to the Subaru 3.6L H6 debate - no, it's 256 horsies do nothing compared to the what, 295 in the pentastar 3.6L, nor is it as powerful as most 3.5L or even Hyundai's 3.3L. Hell, don't even get started on FI motors - the Golf R's 2.0L I4 makes more power than it.
...but what does it exactly mean to be a "class leader"? Numbers on paper? A relevant engine is a relevant engine. Time and time again there's the conundrum: "I like car A better, but car B has a better engine. Which do I choose?"
I like the newest tech as much as the next guy, and I remember drooling over the Juke's 1.6T (and it's whopping 188hp) back in the day of its debut. Now? 1.5Ts make more power and offer better fuel economy.
How about Toyota's new 2.5L? Nobody who drives it will be hella excited by it, yet its engineering is untouched in terms of thermal efficiency.
http://techon.nikkeibp.co.jp/atclen/news_en/15mk/121301018/FCA's 2.4L is a fine engine, it's just nothing exciting (I'd rather it not be called "Tigershark" because that sounds cool or something...). That's not the reason I wouldn't buy the 500X.