If you watch some of the old(er) ones, it's simple stuff but effective. More engaging. Jon Pertwee and companion in a quarry running away from giant mutant worms, a mix of early blue screen and a guy in a rubber suit.
The plots of the new ones seem so convoluted to me, also character-driven instead of plot-driven. Apart from the obvious changes in technology over the years, it's like watching two different shows entirely. I guess bigger budgets don't always produce better television.
Just my view anyway, don't want to annoy any hardcore Whovians!