Itemization and Mastery

Alright, we all see that some items are overpowered atm. Looks like hybrid champions are hit the most with this and it seems that no one can stop them. -Jax,Irelia,Yi etc. are all so strong with Guinsoo's Rageblade. -Rengar with Rapid Forecannon with a disgusting range on his passive and ult jump. -Jax,Irelia,Darius etc with Jaurims fist. -Ludencs Echo on every champion, since it gives that movement speed and insane early damage with a disgusting passive. -Frost queen on Apc since it gives now cdr. -Deadmans plate in combination with Thunderlords is too strong. Deadmans plate's passive is that you stack while moving which converts on a basic into damage + Thunderlords prox. -Qss with its lifesteal replaces BT. -When it comes to Mastery Thunderlords, Strength of Ages, Bond of stone are insane. Even though now a support can go 1v1 against the enemy adc on low levels with Thunderlods, it still doesnt cast a shadow over the Healer mastery or --- Tank mastery which increases the healing,shield strength and replaces the damage going to adc to go to a support. (Imagine Soraka,Jana and Alistar here). -Yasuo with his crit mastery is also pretty much broken. -Nasus's Q heals himself + mastery that on a basic steals hp. -Not even gonna talk about Bard support. Thats a rape right there.

Any thoughts here? This is pretty unbalanced atm, and it doesnt look like it will change anytime soon.