well, i dont know what its like in bronze cause I got placed in Silver 5 straight up and havent played much ranked, but i completely agree with your tips.
this is just something that i experienced a month or so ago:
i remember playing a 5v5 SR match with someone i met on LoL (on skype) and he played as support, he said to me his goal was to ward as well as possible, and gosh did it make it an extremely easy win, he had every vital point in both jungles warded and more. every time one of them ran off with low hp, or their jungler was low in their jungle we just walked in and picked up the kill (or sniped them with an ult), it happened so many times and we got such a massive lead that we soon started demolishing them every teamfight. it quickly turned into a very one-sided fight thanks to the vision his wards gave
good warding saves lives, gets kills, and wins games