I'm a great proponent of bring the old classic yahoo!finance charts back again, but if you really don't wanna bring them back (or at least till you're gonna give us the option to choose) please fix a few things:

1) Bigger (taller) time period box (1, 2, 3, 5, 15 min, daily, weekly, monthly), because now when one wants to open the box and go from, say 1min or 2min chart to daily chart, he has to scroll down. Making this box only slightly taller would fix it and it would save the user some time. Honestly I would just remove the 3min period as well.
2) Put the time periods at the top again, just like before. Now if someone has opened multiple tabs with charts it takes more time to move the mouse and switch from, say 2min to daily. This should be logical;
3) I'm a bar chart user. On bar chart please change the color of bars to dark grey/black, just like it was before or at least make it possible to choose between the old color and the new one. In literature regarding stock trading or investing bar charts are almost always dark grey/black and they're much less distracting than any other color.

Additionally:
4) Remove the horizontal price line (red/green) or make it possible to turn it off. The line gives an illusion that charts are being updated live and they're just distracting;
5) If you decide to change the color of bars to the old color (dark grey), please change back the color of stripes to the one they had before. They're called "gray background strips", but they're not gray anymore. Of course one could turn them off altogether, but I kinda like them.

Please upvote if you agree so that we could all contribute to fixing new charts.
Even if Yahoo decides to bring the old classic charts back again, the changes that I've mentioned would be beneficial to most users of new Yahoo charts.