Senna the Support adc.
Welp. We've been there before. An adc used as support.
However, we've never EXPLICITLY been there before with the intent.
Now..... I have an opinion, and many readers aren't going to like it or want to agree with me..... but....
#I think that the Senna Experiment is going to fail.
Don't get me wrong. I like the concept. I like Senna's design a lot myself.
#BUT
Right now, bot lane meta is absolutely destroyed. Duo Mage bot lanes are often more successful than actual adc bot lanes. In other words, ...... I'm concerned that the concept is dead in its tracks.... because even if we do duo ADC bot, they will be outranged, and outkitted by longer and longer range duo synergies.
It seems like right now...... every 500-600 range adc is hard capped in how much they can control their own lane. Kai Sa, Vayne, Lucian... all generally suffer one thing: Existing in a world where both support and the other adc outrange them. All three, on their own, are generally considered strong kits.... but have you ever noticed that the higher elo Lucian goes, the less he gets to poke, and the more he gets boxed under his own turret? Or, that Kai Sa's lane phase is generally slow, and the pace is controlled by how aggressive and how many gaps the other team gives her? Vayne has been a late game champion for at least 3 seasons now.
If Senna has any sensible range as an "Adc Support," she too is going to be subject to these rules of how adcs work.
Furthermore, (and this is a hypothesis) IF Senna actually has support capability, she's going to be broken out of the box, not necessarily favoring wins, but in the fact she will be difficult to balance. In other words, she will be weighing any supporting abilities in her kit (like an ult that blocks and reflects a shield) against the fact she needs to compensate her adc identity with a support's ability to fight at range and help peel an opposing adc. That's a tall order to do correctly.
League will have added a new romance to play and a new champion, but a whole new can of worms in the form of balancing nightmares. She very well could become the next Karma: Can't be allowed to be strong in any one feature, so left to suffer in general.
+ CC kits = more gold and accumulated control over a game than mid does. It's effortless gold vs contested gold and poor mana management and resourceless assassin mids.