Ardent Censer
Ardent Censer in its current state is rather disappointing/boring for most supports when it comes to it's unique passive. Stat wise it's very cost efficient and all but the gameplay aspect of it is very boring. Even with the changes coming to it won't make it any more interesting.
Currently passive gives 25% attack speed for 6 seconds on allied targets PBE: passive gives 15% attack speed and 30 magic damage per auto attack for 6 seconds on allied targets
Sure it's going to be more impactful after the changes but it still won't make your team go "wooh, nice play with that Ardent Cencer".
In my opinion it's important to take into account the fun factor when making changes to an item. Instead of small buffs to damage and attack speed which you hardly notice, there should be more significant boosts that the player (and the team) can notice and feel he/she has been impactful.
#For example:
- 60 sec cooldown - passive is now an active which increases the power of your next shield/heal ability or summoner spell by 50 (+10% of target missing health) and applies a 75% attack speed buff on target for 3 attacks. Power of aoe heals and shields is increased by 30 (+6% of missing health) and grants 40% attack speed instead of 75%.
(numbers not balanced)
OR
passively gathers up to 3 stacks from which one will be consumed when casting a shield or a heal increasing its effectiveness by 25 (+5% targets missing health) and giving a 75% attack speed boost for 3 attacks. Aoe shields/heals apply the buff prioritizing low health allied champions. A single stack generates in 30 seconds.
Either of these would certainly be a significant change from the subtle buffs cencer currently offers. The team would most likely now notice the effect and you could feel better for using it at the right moments.
+
+ 
landing a bandage and ulting the entire enemy team is flashy.
getting a quadra kill is flashy.
murdering people in three hits is flashy.
silencing four of the enemy team is "meh".
saving her ally with a well timed black shield is "meh".
peeling like a boss for her squishies is "meh".
, then you get the best of both worlds.
and that's about it. And supports usually tend to only have either spellthief's edge or relic shield (or their upgraded versions).
since its release. with 40% cdr lux and keep up the 25% attack speed buff on the shield on her entire team permanently during teamfights