Is there a better way to structure this email?

So basically, I get all of my leads from marketing (something I hate, I love prospecting and collating my own leads which I still do but marketing's have to, annoyingly, take priority). However, for the campaign I have at the moment the leads just aren't up to scratch in the sense, they're irrelevant companies / irrelevant job titles / contact has left the company / contacts are overseas so it's hard to call due to time change etc. I'm currently drawing together an email to send marketing, I want it to sound appreciative for their work but also point out that the leads aren't where they are meant to be. I also want to point out that I have literally no bother in getting my own leads finding the right person / numbers etc but when it's their job I don't want them to feel as though I'm ignoring their work and doing my own, I also want their hard work to go into something more fruitful.

Here's what I have so far:

Hi xyz,

I hope you're well and having a good week so far!

I just wanted to catch up in regards to the current campaign I'm working on and the leads that are currently assigned to me. I have a few concerns around the quality of the leads and am worried that we are potentially putting too much into things that will never come to fruition. I appreciate all the work you guys do in getting the leads together for me but I feel as though we should have a system to cross check them rather than pulling them straight from ZoomInfo into the CRM as there have been quite a few issues with the leads I have.

1. A lot of the numbers associated with the contacts are incorrect
2. A lot of the contacts are no longer with the business
3. A lot of the contacts are irrelevant and have nothing to do with what we're offering them
4. Some companies are based in Asia / Australia which is difficult for me to speak with due to the vast time difference

I think it would be good for us to sit down and speak through some ways we can improve this, so I can deliver in converting the leads given.

Please let me know if this sounds okay - as I say I want to sound diplomatic as it is really in the company's best interest - thanks in advance :)