I am surprised no one mentioned the strong synergy with Enchant Weapon before (neither here, nor at the other page). Apart from its own effect, it accelerates Dragon Pole's bonus damage being online via giving it an arcane slot.

Still, it seems to me that it's designed for Lily, but with Dragon Pole being level 0 any guardian can take it with Versatile and enable the combo.

I used this in a Bark Harrigan deck throughout 4P TFA and I'll say: It's good but unless your deck is built around allies I'd not use this card in solo or duo.

The cost reduction is pretty much always used in full so it's very comparable to an Emergency Cache that gives you one bonus action for playing it. Guardians are always in need of cash so more economy cards is good to have in your deck. But unlike Uncage the Soul the restriction on what you can spend it on really limits you. Unless you plan to play out a lot of allies then Motivational Speech can easily end up being a dead draw in a normal deck.

But the most important factor of this card is that it can be used on other investigators. It's a great tempo piece for the party, especially when other investigators have bought Charisma themselves so that you have at minimum 6-8 opportunities to play it. Don't see this as a worse Emergency Cache #3 and #4. See this as a 0 cost event that gives an ally one extra action and three resources.

Combined with Ever Vigilant (4) and Stand Together (3), Motivational Speech was what I used to make our cluevers start the first round with up to five actions and nine resources saved.

The fast, free disengage is the big seller of this card for most cases, the ability to approach a new enemy without being engaged can be situationally useful, but usually needs some sort of action expansion to really shine so you can do more in that state.

I really liked the theme of this card for a spy like Trish, but felt it was too ephemeral to really tap into that theme. So I designed a deck around having it up all the time: Shadow Ace Trish

Even taboo this card is too strong. Reliable get this card +2 but only +1 other weapon. this is unfair for any other weapon.

maybe give an Exceptional like key of YS will make it less use, however, now it must be a king weapon

I had high hopes for Chuck Fergus when building my Sefina Rousseau deck.He can function like a cheaper, more diversified Leo De Luca (turning events into fast being essentially the same as getting an extra action). By my count, 8 (of 51) Tactic/Trick events cannot use Chuck at all (0-cost, fast events with no skill check). 43 applicable events is still nothing to sneeze at but considering most of them cannot use 1 or 2 of Chuck's abilities, I ultimately passed on him.

Looks like a very promising card but actual utility seems pretty niche/limited.