Many domains/sites hosted on same server, CNAME alternatives to avoid writing same IP in DNS?

I have many sites (each one with its own domain) all on the same cPanel hosted server (let's say server IP is 1.1.1.1 and server main domain is myserver.com)

All these domains use third party DNS (not the cPanel hosted ones), I set up the DNS of each one of these domain to point to server IP. Example of how each domain DNS is currently set:

domainx.com -> A -> 1.1.1.1
domainx.com -> MX -> mail.domainx.com
mail.domainx.com -> A -> 1.1.1.1
www.domainx.com -> CNAME -> domainx.com
ftp.domainx.com -> CNAME -> domainx.com

This situation obliges me to repeat hundreds times the server IP 1.1.1.1 one time for each domain. In the event that server IP changes I will have to go through each domain DNS to update records with new IP.

So I thought why not use CNAME to avoid rewriting server IP everywhere?! I could set each domain DNS like the following:

domainx.com -> CNAME -> myserver.com
domainx.com -> MX -> mail.myserver.com
mail.domainx.com -> CNAME -> myserver.com
www.domainx.com -> CNAME -> myserver.com

ftp.domainx.com -> CNAME -> myserver.com

But I read that domainx.com -> CNAME -> myserver.com is evil, see this and this.

But what alternatives do I have to avoid rewriting server IP everywhere?

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