PSA : Janna had a pretty substantial mini-rework.
What does this mean? It means that a Janna who plays the same as before (Get shield level 1, max it first) is SIGNIFICANTLY weaker in lane and has much less laning presence than before. At level 1, Janna has an 18 second cooldown on the shield, and it only lasts for 70 hp worth of damage. She also has much less max HP than before.
In many circumstances, Janna now maxes W first and is able to build AP to poke in lane, and is quite good at it.
In some situations, Janna has to get and max shield first (high poke lane, high death potential lane, etc), but in most scenarios, please do not expect her to shield you every 5 seconds like before. It is more likely that the Janna will get early points in W and will play aggressively instead.
Please do not "?" ping the Janna. Please do not flame the Janna. Please do not mock the Janna for building AP. Read patch notes and be informed about the changes. Too many recent Janna games have been ruined by primadonna ADCs who spam question marks on me while I'm waiting for my 18s cooldown, then intentionally throw when they think I'm willfully not shielding them.
Thank you.