Personally, when I started to eat moderately when fasting, I started to feel much better. Previously, I would be very tired when breaking the fast... I would be so full that I wouldn't be able to do anything except lie down.
I think that the current trends are due to people nowadays seeing it like a mega celebration, and they see that eating a lot and feeling tired after is just a sign of that celebration. Ramadan is more than just fasting, but I am going off-topic.
By the way, there's a sunnah in Islam to fast Monday's and Thursday's. Some here may find it beneficial.
The health benefits of fasting aren’t about total calorie restriction, but ARE about shifting when you eat to allow your body to kick over into the fasted state for a period of time to get the benefits of that.
I practice a 24 hour fast once a week, for spiritual and health benefits, not to lose weight, and enjoy a very full dinner after the 24 hour fast.
Ramadan looks very much to me to be about fasting, at least spiritually.
Still, it definitely gives you the opportunity to reset every year.
I don't know if that was always the case in history of this religion, maybe in the past the night meal was simply a shared meal with the group, of normal size.
It seems that in your case and mine, we're seeing something that has more to do with symbolism and morals (no gluttony, more thoughtful days, sharing, empathy).
As a practictioner of fasting, I don't think that "modern" Ramadan has much to do with fasting anymore - at least, in the way I see fasting working for me. Reason being that at the end of each day of fasting, there is a very large amount of food being consumed, and I mean a lot. Fasting is about calorie restriction for sustained amount of time - modern Ramadan (based on the experience I had in Saudi, which is a very conservative country) is not really about restricting calories, but just shifting the time of the day in which A LOT of calories are ingested.