Co-ordination shouldn't be a problem, and the radar systems will be mounted on purpose-built towers.
Purpose-built towers will be easy for aircraft to destroy, and if aircraft can't get close enough to attack them then the radar probably isn't doing anything more than acting as a deterrent.
Long-range isn't going to matter much, considering we need these to track airborne targets more than anything.
Airborne targets used by the enemy typically travel quite quickly and at fairly high altitude, which takes time to intercept, detecting them sooner is going to matter much. I do not think that we are going to get radar-guided missiles without some sort of computational revolution, which means waiting for a relevant research breakthrough. I suppose that some sort of primitive computer or purely mechanical system of veering towards radar signal might be possible, but practicality seems so remote...
The precision of these towers is paramount to avoid shooting down our own aeroplanes while retaining full effectiveness against enemy aircraft.
Seriously, these systems are about tracking their movements so we can get interceptors out, not tracking individual planes. Now I agree that precision would be fantastic, as it would allow us to allocate proportional responses. But assuming that "Co-ordination shouldn't be a problem" we should be able to predict with some accuracy the function of a flight based upon where it is headed. And we should be able to keep track of our own aircraft so that we know when they are due and what routes they will be taking. Certainly, enemy aircraft might find out that we can't tell the difference, and then may try to predict what our flights were up to, and then attempt to match the flight patterns of our aircraft, and do so without any forward positions reporting them in from a visual identification, but it seems that we should be able to get by without precision for now.
Naval radar is also a non-issue for us at the moment, as the Capian navy effectively keeps our larger vessels in port.
Ocean is a big place, unless they have their own detection systems, or can blockade our ports, we should be able to send out small raiding parties without issue. Especially if our groups can detect the enemy before the enemy can detect them.
And our divisions do not need the RADAR system in any way, since most aircraft will be in visual range by the time our Hydra can target them
There is a certain advantage to being able to change formations, deploy towed guns, get behind something, and point all your guns in the correct direction before you can actually see the thing shooting at you. And if you can track targets as they return to their bases then so much the better...
And while neither of those will be able to at the end of THIS year, that doesn't mean they cannot have an effect on the war. A lot of weapons and such are designed after field results come in. Cost-wise, we have no reports on that yet, same with it's munition capacity. The Morovians have also built a tank destroyer, wich is almost certainly a casemated AT gun built to counter our heavier tanks, and the odds are of that being uparmoured are pretty high. We will need a gun that can penetrate it's armour with ease else our armoured unts will suffer.
We have capable penetration weapons, and should be able to out-manoeuvre the heavy units. It certainly could get messy, but I don't really see a situation in which we will be driven back by an unstoppable wall of heavy tanks. The simple fact is that the proposed design is for penetrating late-World War II armour when we shouldn't be expecting much early-World War II armour. This cannot come without some sort of cost in weight and cost per round and weight necessitates a certain difficulty of handling. So in short, it would be effective, but, in practical terms, not very effective, and very inefficient. As for the assault rifle, it is going to be a limited-run item unless we sacrifice a lot of production to it. But mostly I just despise the 7.62mm round with a raging furious passion. On account of it being real-world technology, completely unnecessary, will require additional reworking of factories and book-keeping, and has far too many digits...