The aircraft carrier project was delivered early and within budget. They learnt a lot from the modular construction of the Type 45 Destroyer which was a shambles. I hope no one ever has to fight those ships. I won't go into some of the issues (unless you really want me to) but they are major and not fixable without considerable cost.
The system revealed does sound quite interesting. The £2bn does also include a budget for upgrades to the Typhoon to allow them to take over the role of the Tornado (Brimstone missiles and some kind of interesting advanced flight envelope protection that keeps the aircraft within its limits so the pilot can concentrate elsewhere, I believe there's also some kind of enhanced SAM ECM / active countermeasure being installed but I was too drunk when I read it to remember).
The new aircraft is a concept and whilst engineers have designed some of it, the model has been done by artists. They take out all the little bumps and so on to make it look sleeker and even the colour is clearly totally wrong... do you really want a shiny aircraft that'll reflect light, laser and radar? No, it'll be a boring grey or near black I'm sure.
I find a mission pack the length of the fuselage to be very interesting. This will allow kit to be installed depending on the mission and you may have a wing comprised of fighters when previously there would have had to be a support aeroplane in there as well providing SAR, ECM and so on. This makes the whole wing far more flexible and survivable.
Whether these aircraft will be stealthy is another question. Stealth aircraft are horrendously expensive to run and the man hours required to maintain them per hour of flight is insane. Also, I'm not sure if stealth aircraft respond well to the RAF generic fix of applying speed tape to the fault and announcing with confidence "it'll do a trip".
Whilst I do feel we need stealth capability in a mass produced aircraft, for general use we do not need stealth and versatility is far more important along with cost effectiveness. There are some cases where stealth is a disadvantage, such as a Quick Reaction Alert - you want speed, firepower and the hostile aircraft to know you're coming. Additionally, when you have air dominance in a situation, you may well want the enemy to know just how many aircraft you have in that battlespace so they think twice before attacking. Add this to cost effectiveness and maintenence and it does make sense to have stealth and non stealth capability.