I have my gripes against the quality of singing as well. Much as I want to say "oh, those were the days", I believe the singing field is more democratic these days. (Actually, I do say "oh, those were the days" when I hear the lyrics of Kannadasan and the old Vali).
As I said, the huried methods are a mitigating factor when you measure the youngsters. If you look at the number of movies and songs produce in those days, now wonder TMS and PS had the time to develop the rapport they achieved. In fact, I'd argue TMS was way overused, and often outside his areas of competence, just as some youngsters today are.
And the human mind has a funny way of equating the old days, meaning a few decades, against "now" (the last year or so). I like the fact that new singers are tried. It's a delight when you discover a new voice ("who is that voice? he/she is good"). I was delighted to hear Mahanadi Shabhana, The girl who sang "puyale uyale", and the girls who sing "Kanda naal mudhalai".
I feel I've hijacked your original point somewhat. You lamented the lack of bhavam in the newer singers. Given the lyrics these days, what Bhavam do you expect? What's the approriate bhavam for "dailamo dailamo"?
Whe the lyrics are appropriate, some (not many) of the current singers can summon the emotions. To me, "Uyirum neeye" is as moving as "poo mudippal inda poonguzhali".
Corley, Udhaya has linked "Padaithane" at the bottm of the article.