Odoo11 is a light-weight with new changes.

Some of the new changes.

Point Of Sale

Multi-Pricelist – Manage different prices for different customer types.
Customer-Facing Screen – PosBox supports extra screen via HDMI connection.
PDF and Images Preview

Attachments are now previewed inline, with the ability to zoom and navigate across all attachments within a message.

Editable MOs

You are now able to consume other products despite what was initially planned and edit MOs once they are done.

Updated Posted Transactions

You are now able to update any transaction (picking, manufacturing order) after being posted through the new lock/unlock button.

India

The accounting localization has been adapted for GST.

Chart of Accounts

As long as you have not recorded any journal entry in an account, you are able to modify it.

Invoicing

Better integration of the expenses in the sale order and project dashboard.

Batch Payments

Select multiple vendor bills and pay them all at once. Work to credit a batch of customers via SEPA Direct Debit or credit card tokens.

Rainbow Customization

Customize the rainbow animation on any button to reward your users on important achievements.

CRM Standalone App

The CRM application now has its own dashboard icon, no longer combined with the Sales app dashboard.

Leaves Management

Leaves can be automatically recorded within timesheet for better control of the time spent.

Mailing Lists

Improved contacts management and mailing lists.

Deduplication

Prevention mechanism for sending two emails from the same campaign to the same person.

New Apps:

Online Appointments

Allow customers or visitors to book a meeting with your teams and easily manage reminders, schedules, etc.

Marketing Automation

Automate actions and emails based on a campaign flow: follow-up on abandoned carts, automate events reminders, lead nurturing schedules, etc.