I don't necessary dislike the trope, even though I'd personally always opt for justifying the romance only through actual chemistry "onscreen" (I need to start writing again...

)
Where the childhood lovers in DC, especially ShinRan are concerned, I'm quite indifferent. Looking back, when I watched episode one for the first time (I was 5 or 6 at the time), I remember being genre-savvy enough to recognize the trope and I kind of filed Ran under "mandatory Love interest" and their Relationship as a foregone conclusion. So I never really cared for their interactions, because I didn't/don't expect their status to change until the very end (How much it changed is debatable, imho they from they will to they will a bit more). That being said, I freely admit, that being a 6-year old
boy had an effect on my disinterest.
When I found dctp an rekindled my love for DC with a marathon from the first episode on (Bet I'm not the only one who did that

), what piqued my interest was the introduction of Ai into the dynamic. I won't go into depth here, because I don't wan't to steer this into shipping territory, but I think that the "love triangle" could have provided a good opportunity to get more development out of the, imho a little bit stale/boring ShinRan relationship. But the chances for that were lost some 400 eps ago.
Tl;DR: Don't particularly care for them, with a little "spice" they could get interessting