Torn on Adding Lisbon to a Barcelona/Mallorca Trip

My GF (Late 20s) and myself (Early 30s) have been wanting to travel to Spain for a while now, specifically Barcelona and Mallorca. Due to her work schedule, we are only able to go in late August (I know, I know) so we are prepared for the crowds and everything that comes with it.

We have heard great things about Lisbon and figured we would throw that into the trip too. So right now we have flights into Barcelona and out of Lisbon. The problem is that gives us 2 full days in one location, and 3 full days in the other 2. We definitely want to spend at least 3 full days in Mallorca, but I am unsure how to split the other days or if we should cut out Lisbon and focus on Barcelona and Mallorca. I know there are plenty of day trips we could take from Barcelona as well to explore.

Current Proposed Itinerary:

• Barcelona Day 1 (Land at 10am local time), Day 2, Day 3
• Travel to Mallorca Day 4
• Mallorca Day 5, Day 6, Day 7
• Travel to Lisbon Day 8
• Lisbon Day 9, Day 10, Day 11
• Travel Home Day 12

We want to enjoy some great food, cool bars (day drinking or a drink after dinner, no nightclubs) and enjoy the european coast/beaches. I surf (part of the draw to lisbon) but otherwise we are fine at a beach bar or club. We are fairly adventurous and like taking in the local sites and history and walking around, but I don't want to plan a trip around historical sites. The food, drinks, and actual activities are more important.

Does anyone have any insight or have done this trip or similar? We will be disappointed in Lisbon? Happy to answer any clarifying questions, and thank you in advance!

EDIT: We can both get by with Spanish but would touch up on it and take some lessons/tutoring before the trip. I have never tried to speak Portuguese, but would plan to pick it up at a beginner level.