I have played the Peninsula campaign on max difficulty for a couple of hours now and boy it is hard! In about 10 terms of the campaign the French will have about five or four full Staggs armies on your borders, as a results on this campaign you will make more defences of towns and cities rather then offence attacks on other towns or city's.
But other than that this campaign is really enjoyable, I love the history of the Peninsula wars, and also I love the mix of Spanish and Portuguese auxiliary units you can recruit, I also love that you can finally recruit King German legion, line infantry and Light Infantry units in the campaign but I am kind of annoyed how are you can only recruit these units in the peninsula campaign rather then the grand campaign.
One of the features I was looking forward to in this campaign was the griller units, but it's disappointing that playing as Great Britain you can only get these units if you liberate the settlement back to the Spanish, and they will reward you with three griller units, that also includes a gorilla generals bodyguard that is armed with Calvary muskets instead of Sabres like normal Generals and he can also deploy outside of that Deployment zone, and it's a free general!
I also like It, when the Al is attacking a city or town if it finds that the battle isn't going in its favour, the Al will instead retreat from the battlefield, I also like how CA has added Spanish themed music for the campaign map alongside with the vanilla soundtrack music, and I also like it when you're on the main menu of the game when you click on Peninsula campaign tab it will play the music there used in the trailer instead of the NTW theme song, I also like how religion has made a kind of of a comeback through the anti-French and pro-Allied system when in the campaign, and it Adding agents that can convert the population to your cause.
One are the problems I hwsave the campaign is that the Spanish and Portuguese AI doesn't appear to be very active, and that the Spanish and Portuguese or units are easily crushed by the much more superior French units this means you have to recruit the British units instead, but the British units are much more expensive then the Portuguese and Spanish auxiliary units, as a result it is too expensive to recruit a load of European units, One of the other problems I have is that the French upgraded their buildings much more quickly than the player does, and I also don't like how European units can only be recruited via tradeports, this means that any retreated French army can easily rick your ability to recruit units, also I don't like how are the unit can't pictures are are slightly different to the vanilla game, but the these pictures cards pictures are the same unit card pictures, that are used on the Total War Wiki.