Should we talk about deals and firm-related issues and what not in applications? For example, I'm writing a cover letter for Wedlake Bell's open day (on the deadline lol so not hopeful) and the prompt is Demonstrate your interest in Wedlake Bell and a career in Law. Is it necessary to talk about the firm's deals for questions like this?
It depends as to whether it makes sense for your and your interests. I think that it is not a necessity to be honest. I did it for most applications but not all of them and I manage to get through some firms without mentioning any deals. As long as you are mentioning a deal and link it back to you and why it is interested to you. This is an important point.
There are many other things you can talk about when you are trying to give reasons as to why you are applying to a certain firm: their commitment to ESG, D,E & I, the strength and reputation of a practice area, the structure of their training contract and international opportunities. These factors are perfectly fine to mention, especially if you can link it back to you. This link is what differentiates you from other people.