No, anything possible for editing like feature like more that can be ask for, but somethings not possible like changing layout, color, font..., related to these task we will not do, it because we now focus on improved feature.
Odoo saas 2.0 support from odoo v11, v12 & so on.. You already have odoo database then you can merge to your saas by importing. When generating Odoo client from saas, just chose option import from outside then import DB to your saas Next step => go to terminal add custom addons to your client [...]
SaaS basic/standard pack will be default Logo & name = Odoo.Cheap, Default domain to generate client will be *.odoo.cheap For premium pack saas 2.0 will it all will be rebuild with your own brand name included logo, name, default domain with your domain name.
Important noted: SaaS 2.0 using Let’s Encrypt for SSL it totally free, but Let's Encrypt have a rule for generating SSL key limits, so it cannot generate too many SSL keys at the same time, your system will fail to generate Odoo App instance. for more info, plz visits here: https://letsencrypt.org/docs/rate-limits/ Odoo SaaS 2.0 [...]
To add your extra add-ons to your client before create client do the following step Navigate to Apps => launch => Odoo SaaS 2.0 => under configuration tab => chose From git = True  and fill out the required information for:  git user name or token name,  git pass or git token [...]
To upgrade or downgrade your client you can do the following Go to SaaS => Default => Apps => client want to upgrade =>  click in 3 doted and select upgrade, from next screen you can edit to upgrade or downgrade Odoo SaaS 2.0 Upgrade client
To create client you need to fill out Client Name , Nam space , Select Odoo Plan (Odoo version)  SaaS config client info After choosing the Odoo plan  then need to select auto-generate subdomain or add your custom domain  and chose ssl or not SSL  if select True system [...]
SaaS 2.0 build on a special k8s library so depends on the port you want to open then the first login will ask you like the images bellow. Odoo SaaS 2.0 Frist login welcome screen After login you will be direct to admin panel => then you need to navigate to Global => [...]