pardon my english, je suis francais

I'm new to OpenCart.
Webmaster of a medium ecommerce website since 2003 (Actinic > OsCommerce), we were feeling the need for a change since 2007, but waiting for OsCommerce v3 to be released. Since the first RCs are basically a joke (no OOP, no templating, etc), I choose to switch from OsCommerce. After a few comparisons (mainly Prestashop vs Opencart vs WP eCommerce - I'm a WP developer since 2006), OpenCart seems the good choice.
+ of Opencart :
+ very fast (time to first byte under 0.5 sec, full load of front end demo page - not optimized btw - under 8 sec, versus 10 sec for PS)
+ young (more flexible)
+ relatively easy to customize (vs Prestashop)
+ no Smarty (a pita)
- of OpenCart
- MVC. which means useless complexity
- young (less features)
- 3 to 6 files to code the smallest module
-- no hooks !! that's a big - , see WP which greatly benefits from the hook system, allowing even junior developers to achieve complex plugins.
- (hook related) no pre coded way to do small things (add an admin menu / submenu, filter the description of products, etc.)
- translation system is file based, I'd much rather have a po/mo translation system, which is error proof, degrades nicely (instead of missing file Fatal Error)
Background:
2 OsCommerce websites, heavily customised
more than 20 WP websites in production, some with more than 100k PV / day
The main tasks I'm going to work on :
OsCommerce importer (full import, products, attributes, customers, orders)
Automated SEO URL (translate products and categories names into clean URL slugs)
Adding hooks : I don't know the viability of this, but I know hooks are a powerful boost to community development.